ITU-T E.164
E1042139
ITU-T E.164 is an international telecommunication standard that defines the global format and structure for public telephone numbers to ensure worldwide interoperability.
All labels observed (2)
| Label | Occurrences |
|---|---|
| E.164 | 1 |
| ITU-T E.164 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T13496793 — 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: ITU-T E.164 Context triple: [German telephone numbering plan, standardReference, ITU-T E.164]
-
A.
ITU-T G series
The ITU-T G series is a collection of international telecommunication standards that define characteristics and requirements for transmission systems and media, digital networks, and related interfaces.
-
B.
North American Numbering Plan
The North American Numbering Plan is a standardized telephone numbering system that organizes and assigns area codes and phone numbers across the United States, Canada, and several other participating territories.
-
C.
World Administrative Telegraph and Telephone Conference 1988
The World Administrative Telegraph and Telephone Conference 1988 was a major international gathering of member states of the International Telecommunication Union that updated and harmonized global rules governing international telecommunication services and operations.
-
D.
Standard Telecommunication Laboratories
Standard Telecommunication Laboratories was a British research facility renowned for its pioneering work in fiber-optic communications, notably associated with the groundbreaking research of Charles K. Kao.
-
E.
Brazilian telephone numbering plan
The Brazilian telephone numbering plan is the national system that defines how phone numbers are structured, assigned, and dialed throughout Brazil, including area codes and rules for local and long-distance calls.
- 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: ITU-T E.164 Target entity description: ITU-T E.164 is an international telecommunication standard that defines the global format and structure for public telephone numbers to ensure worldwide interoperability.
-
A.
ITU-T G series
The ITU-T G series is a collection of international telecommunication standards that define characteristics and requirements for transmission systems and media, digital networks, and related interfaces.
-
B.
North American Numbering Plan
The North American Numbering Plan is a standardized telephone numbering system that organizes and assigns area codes and phone numbers across the United States, Canada, and several other participating territories.
-
C.
World Administrative Telegraph and Telephone Conference 1988
The World Administrative Telegraph and Telephone Conference 1988 was a major international gathering of member states of the International Telecommunication Union that updated and harmonized global rules governing international telecommunication services and operations.
-
D.
Standard Telecommunication Laboratories
Standard Telecommunication Laboratories was a British research facility renowned for its pioneering work in fiber-optic communications, notably associated with the groundbreaking research of Charles K. Kao.
-
E.
Brazilian telephone numbering plan
The Brazilian telephone numbering plan is the national system that defines how phone numbers are structured, assigned, and dialed throughout Brazil, including area codes and rules for local and long-distance calls.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
ITU-T Recommendation
ⓘ
telecommunication numbering standard ⓘ |
| appliesTo |
geographic numbers
ⓘ
global service numbers ⓘ mobile country codes and networks via associated recommendations ⓘ non-geographic numbers ⓘ shared-cost numbers ⓘ toll-free numbers ⓘ universal international freephone numbers ⓘ |
| defines |
global format for public telephone numbers
ⓘ
international public telecommunication numbering plan NERFINISHED ⓘ maximum length of international telephone numbers ⓘ |
| domain | telecommunication numbering ⓘ |
| ensures |
uniqueness of international telephone numbers
ⓘ
worldwide interoperability of telephone numbers ⓘ |
| excludes |
international prefix in the E.164 number
ⓘ
trunk prefix in the E.164 number ⓘ |
| formatExample | +CC NDC SN ⓘ |
| includes |
country code
ⓘ
national destination code ⓘ subscriber number ⓘ |
| maintainedBy | ITU-T Study Group 2 NERFINISHED ⓘ |
| maximumDigits | 15 ⓘ |
| numberingPlanType | closed numbering plan GENERATED ⓘ |
| objective |
facilitation of global call routing
ⓘ
harmonization of international numbering ⓘ |
| publishedBy | International Telecommunication Union NERFINISHED ⓘ |
| relatedTo |
E.164.1
NERFINISHED
ⓘ
E.164.2 NERFINISHED ⓘ E.164.3 NERFINISHED ⓘ E.164.4 ⓘ ITU-T E.163 NERFINISHED ⓘ |
| scope |
international telephone service
ⓘ
public telecommunication services ⓘ |
| sector | ITU-T NERFINISHED ⓘ |
| status | in force ⓘ |
| usedBy |
VoIP service providers
ⓘ
mobile network operators ⓘ national numbering plans ⓘ regulators for numbering policy ⓘ telecommunication operators ⓘ |
| usedFor |
ENUM mapping to DNS
ⓘ
ISDN numbering ⓘ PSTN numbering ⓘ SIP-based telephony addressing ⓘ VoIP telephone numbering ⓘ mobile telephone numbering ⓘ |
| usesPrefix | plus sign for international format ⓘ |
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: ITU-T E.164 Description of subject: ITU-T E.164 is an international telecommunication standard that defines the global format and structure for public telephone numbers to ensure worldwide interoperability.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
E.164