ĐịA Chỉ: 5000 (From 5000 To 5149) W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748, USA
47260-9748 là gì? 47260-9748 là mã bưu chính 5 cộng 4 số của 5000 (From 5000 To 5149) W (West) COUNTY ROAD 50 N (North), MEDORA, IN, USA. Dưới đây là thông tin chi tiết.
47260-9748 Thông tin cơ bản
-
Số Zip 5 Cộng Với 4:
47260-9748 -
Số Zip 5:
47260 -
Cộng Với 4?97484-digits that are used to identify a geographic segment within the 5-digit delivery area, such as a city block or a group of apartments or an individual high-volume receiver of mail, or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery. This code is the low end of the range of +4 Codes that pertain to this ZIP Code. ZIP+4 Codes associated with nondelivery areas are composed of valid ZIP sector numbers and "ND" for the ZIP segment number, for example 12345-12ND. Non-deliverable areas are areas to which the USPS does not deliver mail, such as vacant lots and land that borders railroad tracks. Mailers should not match an address identified as a nondelivery area. If you absolutely must have numeric characters in the Plus4Code column, you may treat "ND" values as "00" (zero zero).:
-
Quốc Gia:
U.S. - Hoa Kỳ -
Bang:
IN - Indiana -
Quận:
CountyFIPS: 18071 - Jackson County -
Thành Phố:
MEDORA -
Hướng trước đường phố:
W (West) -
Đường Phố?COUNTY ROAD 50The official name of a street as assigned by a local governing authority. The Street Name column contains only the street name and does not include directionals (EAST, WEST, etc.) or suffixes (ST, DR, BLVD, etc.). This element may also contain literals, such as PO BOX, GENERAL DELIVERY, USS, PSC, or UNIT. Numeric street names that have numeric components that are four characters (or less) in length at are justified such that the low-order digit of the number is positioned in the fourth position of the street name column. This shift is made so that the numeric street names appear in numeric sequence.:
-
Hướng sau đường phố?N (North)A geographic direction that precedes the street name. For Example: 472 MAIN ST N Street Pre-Direction Abbreviation = N Spaces = No pre-direction N = North NE = Northeast E = East SE = Southeast S = South SW = Southwest W = West NW = Northwest:
-
Loại ghi?S: Đường PhốAn alphabetic value that identifies the type of data in the record. Record type codes include the following: G = General delivery H = Highrise F = Firm S = Street P = PO box R = Rural route/highway contract:
ĐịA Chỉ
- Số thấp vị địa chỉ chính?
A house, rural route, highway contract box, or post office box number; the numeric or alphanumeric component of an address preceding the street name; the low-end address in a range of addresses. Often referred to as house number.: 5000
- Số cao vị địa chỉ chính?
A house, rural route, contract box, or Post Office box number. The numeric or alphanumeric component of an address preceding the street name. The high-end address in a range of addresses. Often referred to as house number.: 5149
- Mã chẵn/Lẻ địa chỉ chính?
Code that identifies the side or sides of a street for which a given address range is applicable. For street, highrise, firm and multi-carrier records, B = Both sides of a street, E = Even side of a street (even-numbered addresses in the range); O = Odd side of a street (odd-numbered addresses in the range). For general delivery, post office box, and rural route/highway contract records, this code will always be "B" (both).: Both of Odd and Even
- Sơ cấp Nhiều: 5000, 5001, 5002, 5003, 5004, 5005, 5006, 5007, 5008, 5009, 5010, 5011, 5012, 5013, 5014, 5015, 5016, 5017, 5018, 5019, 5020, 5021, 5022, 5023, 5024, 5025, 5026, 5027, 5028, 5029, 5030, 5031, 5032, 5033, 5034, 5035, 5036, 5037, 5038, 5039, 5040, 5041, 5042, 5043, 5044, 5045, 5046, 5047, 5048, 5049, 5050, 5051, 5052, 5053, 5054, 5055, 5056, 5057, 5058, 5059, 5060, 5061, 5062, 5063, 5064, 5065, 5066, 5067, 5068, 5069, 5070, 5071, 5072, 5073, 5074, 5075, 5076, 5077, 5078, 5079, 5080, 5081, 5082, 5083, 5084, 5085, 5086, 5087, 5088, 5089, 5090, 5091, 5092, 5093, 5094, 5095, 5096, 5097, 5098, 5099, 5100, 5101, 5102, 5103, 5104, 5105, 5106, 5107, 5108, 5109, 5110, 5111, 5112, 5113, 5114, 5115, 5116, 5117, 5118, 5119, 5120, 5121, 5122, 5123, 5124, 5125, 5126, 5127, 5128, 5129, 5130, 5131, 5132, 5133, 5134, 5135, 5136, 5137, 5138, 5139, 5140, 5141, 5142, 5143, 5144, 5145, 5146, 5147, 5148, 5149.
Vui lòng nhấp vào "Ví dụ về địa chỉ khác" để xem toàn bộ danh sách.
5000 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5001 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5002 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5003 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5004 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5005 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5006 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5007 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5008 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5009 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5010 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5011 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5012 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5013 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5014 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5015 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5016 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5017 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5018 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5019 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5020 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5021 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5022 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5023 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5024 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5025 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5026 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5027 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5028 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5029 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5030 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5031 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5032 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5033 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5034 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5035 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5036 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5037 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5038 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5039 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5040 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5041 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5042 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5043 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5044 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5045 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5046 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5047 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5048 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5049 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5050 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5051 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5052 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5053 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5054 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5055 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5056 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5057 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5058 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5059 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5060 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5061 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5062 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5063 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5064 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5065 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5066 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5067 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5068 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5069 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5070 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5071 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5072 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5073 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5074 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5075 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5076 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5077 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5078 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5079 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5080 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5081 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5082 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5083 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5084 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5085 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5086 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5087 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5088 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5089 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5090 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5091 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5092 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5093 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5094 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5095 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5096 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5097 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5098 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5099 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5100 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5101 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5102 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5103 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5104 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5105 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5106 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5107 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5108 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5109 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5110 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5111 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5112 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5113 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5114 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5115 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5116 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5117 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5118 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5119 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5120 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5121 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5122 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5123 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5124 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5125 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5126 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5127 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5128 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5129 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5130 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5131 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5132 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5133 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5134 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5135 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5136 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5137 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5138 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5139 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5140 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5141 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5142 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5143 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5144 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5145 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5146 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5147 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5148 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
5149 W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748
ĐịA Chỉ Ví dụ
MEDORA IN 47260-9748
UNITED STATES OF AMERICA
47260-9748 Ví dụ phong bì
-
Đây là một ví dụ về phong bì của Hoa Kỳ. Điền thông tin người gửi ở trên cùng bên trái và thông tin người nhận ở dưới cùng bên phải. Thông tin cần thiết là tên đầy đủ của người gửi / người nhận, địa chỉ đường phố, thành phố, tiểu bang và mã vùng. Thông tin địa chỉ người nhận đã được cung cấp để bạn tham khảo. Nói chung, Nếu bạn không chắc chắn về mã zip gồm 9 chữ số đầy đủ, bạn chỉ có thể điền vào mã zip 5 chữ số để tránh mất gói.
47260-9748 Ý nghĩa cơ bản
-
Mỗi chữ số của mã ZIP code 47260-9748 là viết tắt của gì? Mã ZIP + 4 bao gồm hai phần, năm chữ số đầu tiên có thể xác định vị trí của bưu điện và bốn chữ số cuối cùng có thể xác định một phân đoạn địa lý trong khu vực giao hàng năm chữ số. Các chữ số 6-7 chỉ khu vực hoặc một số khối và 8-9 chữ số chỉ định đoạn hoặc một bên của đường phố.
- ·ID Tuyến đường vận chuyển?
A 4-digit code assigned to a mail delivery or collection route within a 5-digit ZIP Code. The first character of this identification is alphabetical, and the last three are numeric: Bnnn = PO box Hnnn = Highway contract Rnnn = Rural route Cnnn = City delivery Gnnn = General delivery: R065 (Tuyến đường nông thôn)
- ·Phần thấp bổ sung phân phát?
The ZIP Add-On Low Sector and the ZIP Add-On Low Segment together form the ZIP Add-On Low Number. The ZIP Add-On Low Number is the last four positions of a ZIP+4 code; the low-end ZIP add-on in a range of codes; the add-on of the first ZIP+4 code in a consecutive series of ZIP+4 codes assigned to the delivery address. For example, most delivery addresses are assigned a single ZIP+4 code. However, large companies may be given a range of ZIP+4 codes that can be used to route mail to specific departments. A range of ZIP+4 codes can also be assigned to a corresponding range of post office boxes, and each box is mapped, one-to-one, with a ZIP+4 code in the range. A single post office box can also be assigned a range of ZIP+4 codes.: 97
- ·Đoạn thấp bổ sung phân phát?
The ZIP Add-On Low Sector and the ZIP Add-On Low Segment together form the ZIP Add-On Low Number. The ZIP Add-On Low Number is the last four positions of a ZIP+4 code; the low-end ZIP add-on in a range of codes; the add-on of the first ZIP+4 code in a consecutive series of ZIP+4 codes assigned to the delivery address. For example, most delivery addresses are assigned a single ZIP+4 code. However, large companies may be given a range of ZIP+4 codes that can be used to route mail to specific departments. A range of ZIP+4 codes can also be assigned to a corresponding range of post office boxes, and each box is mapped, one-to-one, with a ZIP+4 code in the range. A single post office box can also be assigned a range of ZIP+4 codes.: 48
- ·Phần cao bổ sung phân phát?
The ZIP Add-On High Sector and the ZIP Add-On High Segment together form the ZIP Add-On High Number, which is the high-end ZIP add-on in a range of codes; the add-on of the last ZIP+4 code in a consecutive series of ZIP+4 codes assigned to the delivery address. Most delivery addresses are assigned a single ZIP+4 code; however, large companies may be given a range of ZIP+4 codes that can be used to route mail to specific departments. A range of ZIP+4 codes can also be assigned to a corresponding range of post office boxes, and each box is mapped, one-to-one, with a ZIP+4 code in the range. A single post office box can also be assigned a range of ZIP+4 codes. (See also ZIP Add-On Code.): 97
- ·Đoàn cao bổ sung phân phát?
The ZIP Add-On High Sector and the ZIP Add-On High Segment together form the ZIP Add-On High Number, which is the high-end ZIP add-on in a range of codes; the add-on of the last ZIP+4 code in a consecutive series of ZIP+4 codes assigned to the delivery address. Most delivery addresses are assigned a single ZIP+4 code; however, large companies may be given a range of ZIP+4 codes that can be used to route mail to specific departments. A range of ZIP+4 codes can also be assigned to a corresponding range of post office boxes, and each box is mapped, one-to-one, with a ZIP+4 code in the range. A single post office box can also be assigned a range of ZIP+4 codes. (See also ZIP Add-On Code.): 48
- ·Mã Bưu Thêm vào: 9748
- ·Nhiều?
The range of +4 codes. Summing the +4 Code and the +4 Range will give you the high end of the range of +4 Codes that pertain to this ZIP Code.: 0
- ·Mã thay thế cơ bản?
Code that specifies whether a record is a base (preferred) or alternate record. Base records (represented as "B") can represent a range of addresses or an individual address, such as a firm record, while alternate records (represented as "A") are individual delivery points. Government deliveries will only be listed on alternate records with the appropriate government building indicator (federal, state, or city) set.: Cơ sở
- ·Con số tài chính?
A code assigned to Postal Service facilities (primarily post offices) to collect cost and statistical data and compile revenue and expense data. The state number comprises the first two positions of the finance number.: 175291
- ·Số phân khu Quốc hội?
A standard value identifying a geographic area within the United States served by a member of the US House of Representatives or Senate. If Army/Air Force (APO) or fleet post office (FPO), this column will be blank. If there is only one member of Congress within a state, the code will be "AL" (at large).: 09
- ·Mã bang thành phố hàng cuối?
An index to the City State file that provides the preferred last-line name for this address range.: X12903
Bản đồ trực tuyến
Đây là bản đồ điện tử phù hợp với địa chỉ 5000 W (West) COUNTY ROAD 50 MEDORA. Bạn có thể sử dụng phím bấm trong bản đồ để di chuyển, thu nhỏ, phóng to. Thông tin của bản đồ đó chỉ cung cấp để tham khảo.
ĐịA Chỉ: 5000 (From 5000 To 5149) W (West) COUNTY ROAD 50 N (North), MEDORA, IN 47260-9748, USA
Viết bình luận