United States ZIP code system
E639434
The United States ZIP code system is a nationwide postal coding scheme used by the U.S. Postal Service to efficiently sort and deliver mail by assigning numeric codes to geographic areas.
All labels observed (5)
| Label | Occurrences |
|---|---|
| United States ZIP code system canonical | 3 |
| United States ZIP Code system | 1 |
| ZIP Code | 1 |
| ZIP+4 | 1 |
| ZIP+4 Codes | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7050322 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: United States ZIP code system Context triple: [Silver City, Iowa, postalCodeRegion, United States ZIP code system]
-
A.
USPS state and territory abbreviation system
The USPS state and territory abbreviation system is the standardized set of two-letter codes used by the United States Postal Service to identify states and territories for mail addressing and processing.
-
B.
USPS Address Management System
The USPS Address Management System is a United States Postal Service infrastructure and set of tools used to standardize, validate, and maintain accurate mailing addresses across the country.
-
C.
National Location Code system
The National Location Code system is a standardized scheme used to uniquely identify railway locations and facilities across a national rail network for operational, ticketing, and data management purposes.
-
D.
Netherlands postal code system
The Netherlands postal code system is a structured alphanumeric addressing scheme used throughout the country (including special municipalities like Saba) to precisely identify geographic locations for mail delivery.
-
E.
ISO 3166-2:US
ISO 3166-2:US is the section of the ISO 3166 standard that defines internationally recognized subdivision codes for the states and territories of the United States.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: United States ZIP code system Target entity description: The United States ZIP code system is a nationwide postal coding scheme used by the U.S. Postal Service to efficiently sort and deliver mail by assigning numeric codes to geographic areas.
-
A.
USPS state and territory abbreviation system
The USPS state and territory abbreviation system is the standardized set of two-letter codes used by the United States Postal Service to identify states and territories for mail addressing and processing.
-
B.
USPS Address Management System
The USPS Address Management System is a United States Postal Service infrastructure and set of tools used to standardize, validate, and maintain accurate mailing addresses across the country.
-
C.
National Location Code system
The National Location Code system is a standardized scheme used to uniquely identify railway locations and facilities across a national rail network for operational, ticketing, and data management purposes.
-
D.
Netherlands postal code system
The Netherlands postal code system is a structured alphanumeric addressing scheme used throughout the country (including special municipalities like Saba) to precisely identify geographic locations for mail delivery.
-
E.
ISO 3166-2:US
ISO 3166-2:US is the section of the ISO 3166 standard that defines internationally recognized subdivision codes for the states and territories of the United States.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf | postal code system ⓘ |
| abbreviation | ZIP ⓘ |
| administeredBy | USPS Address Management System ⓘ |
| codeRange | 00001–99950 ⓘ |
| codeType | numeric ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| doesNotAlwaysAlignWith |
city boundaries
ⓘ
county boundaries ⓘ state boundaries ⓘ |
| extendedCodeLength | 9 digits ⓘ |
| extendedFormatName |
ZIP+4
ⓘ
linked to:
United States ZIP code system
|
| firstDigitMeaning | broad geographic region ⓘ |
| firstThreeDigitsMeaning | sectional center facility area ⓘ |
| fullName | Zone Improvement Plan ⓘ |
| geographicCoverage |
50 U.S. states
ⓘ
District of Columbia ⓘ U.S. military mail system ⓘ U.S. territories ⓘ
linked to:
United States territories
freely associated states ⓘ |
| hasComponent |
delivery segment code
ⓘ
postal zone code ⓘ sectional center facility code ⓘ |
| implementationStartDate | 1963-07-01 ⓘ |
| introducedBy | United States Postal Service ⓘ |
| introducedInYear | 1963 ⓘ |
| lastTwoDigitsMeaning | local post office or delivery area ⓘ |
| mandatoryUseStartYear | 1967 ⓘ |
| operator | United States Postal Service ⓘ |
| plus4Meaning | specific segment such as block, building, or high-volume receiver ⓘ |
| primaryPurpose |
mail delivery routing
ⓘ
mail sorting ⓘ |
| relatedSystem |
PO Box-only ZIP codes
ⓘ
ZIP+4 ⓘ military ZIP codes ⓘ unique ZIP codes ⓘ |
| specialAllocation |
federal government agencies
ⓘ
large-volume mail recipients ⓘ military APO/FPO/DPO addresses ⓘ post office boxes ⓘ |
| standardCodeLength | 5 digits ⓘ |
| standardizedBy | USPS Publication 28 ⓘ |
| usedFor |
address validation
ⓘ
automated mail processing ⓘ bulk mail discounts ⓘ demographic analysis ⓘ market segmentation ⓘ service area definition ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: United States ZIP code system Description of subject: The United States ZIP code system is a nationwide postal coding scheme used by the U.S. Postal Service to efficiently sort and deliver mail by assigning numeric codes to geographic areas.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: United States ZIP code system
subject linked to:
CEP (Brazilian postal code system)
linked to: United States ZIP code system
linked to: United States ZIP code system
linked to: United States ZIP code system