Pacific Telesis
E177032
Pacific Telesis was a regional telecommunications company formed after the breakup of AT&T, serving as one of the Baby Bells providing local telephone and related services in the western United States.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Pacific Telesis canonical | 4 |
| Pacific Telesis Group | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1565746 — 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: Pacific Telesis Context triple: [Bell System, successor, Pacific Telesis]
-
A.
Telewest
Telewest was a major UK cable television, broadband, and telecommunications provider that later became part of Virgin Media through a merger.
-
B.
Southern Telecom
Southern Telecom is a telecommunications subsidiary of Southern Company that provides fiber-optic network and related communication services.
-
C.
KDDI
KDDI is a major Japanese telecommunications company that provides mobile, broadband, and other communication services domestically and internationally.
-
D.
NTT DoCoMo
NTT DoCoMo is Japan’s largest mobile network operator, known for pioneering advanced mobile technologies and services, including early 3G deployments.
-
E.
Northern Telecom
Northern Telecom was a major Canadian telecommunications equipment manufacturer and technology company, later known as Nortel Networks, that played a significant role in global telecom infrastructure.
- 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: Pacific Telesis Target entity description: Pacific Telesis was a regional telecommunications company formed after the breakup of AT&T, serving as one of the Baby Bells providing local telephone and related services in the western United States.
-
A.
Telewest
Telewest was a major UK cable television, broadband, and telecommunications provider that later became part of Virgin Media through a merger.
-
B.
Southern Telecom
Southern Telecom is a telecommunications subsidiary of Southern Company that provides fiber-optic network and related communication services.
-
C.
KDDI
KDDI is a major Japanese telecommunications company that provides mobile, broadband, and other communication services domestically and internationally.
-
D.
NTT DoCoMo
NTT DoCoMo is Japan’s largest mobile network operator, known for pioneering advanced mobile technologies and services, including early 3G deployments.
-
E.
Northern Telecom
Northern Telecom was a major Canadian telecommunications equipment manufacturer and technology company, later known as Nortel Networks, that played a significant role in global telecom infrastructure.
- F. None of above. chosen
Statements (38)
| Predicate | Object |
|---|---|
| instanceOf |
Baby Bell
ⓘ
regional telecommunications company ⓘ |
| acquiredBy | SBC Communications ⓘ |
| brand |
Pacific Bell
ⓘ
surface form:
PacTel
|
| category |
Defunct telecommunications companies of the United States
ⓘ
Regional Bell Operating Companies ⓘ
surface form:
Regional Bell Operating Company
|
| country |
United States of America
ⓘ
surface form:
United States
|
| dateAcquired | 1997 ⓘ |
| dateFormed | 1984 ⓘ |
| fate | acquired and absorbed by SBC Communications ⓘ |
| headquartersLocation |
San Francisco, California, United States of America
ⓘ
surface form:
San Francisco, California
|
| historicalRole | provided local exchange service in California and Nevada after AT&T divestiture ⓘ |
| industry | telecommunications ⓘ |
| laterOwnedBy |
AT&T
ⓘ
surface form:
AT&T Inc.
|
| legalForm | public company ⓘ |
| notableSubsidiaryBrand | PacTel Cellular ⓘ |
| operatedTechnology |
Public Switched Telephone Network
ⓘ
copper local loops ⓘ early digital switching systems ⓘ |
| operationalStatus | defunct ⓘ |
| originEvent | breakup of AT&T ⓘ |
| parentCompany |
AT&T
ⓘ
surface form:
AT&T Corporation
|
| partOf | Regional Bell Operating Companies ⓘ |
| providedService |
data communications services
ⓘ
directory publishing ⓘ local telephone service ⓘ wireless services ⓘ |
| regulatedBy |
California Public Utilities Commission
ⓘ
Federal Communications Commission ⓘ |
| serviceArea |
California, United States
ⓘ
surface form:
California
Nevada ⓘ western United States ⓘ |
| spunOffFrom |
AT&T
ⓘ
surface form:
AT&T Corporation
|
| stockExchangeListing | New York Stock Exchange ⓘ |
| subsidiary |
Nevada Bell
ⓘ
Pacific Bell ⓘ |
| successor | SBC Communications ⓘ |
| tickerSymbol | PAC ⓘ |
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: Pacific Telesis Description of subject: Pacific Telesis was a regional telecommunications company formed after the breakup of AT&T, serving as one of the Baby Bells providing local telephone and related services in the western United States.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Pacific Telesis Group