Input a CLLI:

Tip: A Partial CLLI can be entered, but must contain a minimum of the first 6 characters. I.E. 'DLLSTX'

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🔎 Tip: Click any Company, OCN, Rate Center, or CLLI to explore related telecom data

npa-nxxStateCompanyFRNRMDOCNRate CenterCLLIAssign DateMisc
925-246CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-246 is split into 1,000-number blocks - detail below
925-246-0XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-246-1XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-246-4XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-246-6XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-246-7XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-246-8XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-246-9XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-363CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-521CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-521 is split into 1,000-number blocks - detail below
925-521-0XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-521-1XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-521-2XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-521-3XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-521-5XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-521-7XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-521-9XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-602CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-609CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-609 is split into 1,000-number blocks - detail below
925-609-0XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-609-1XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-609-2XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-609-3XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-609-5XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-609-6XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-609-7XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-609-8XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-609-9XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-677CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-677 is split into 1,000-number blocks - detail below
925-677-0XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-677-2XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-677-3XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-677-4XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-677-5XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-677-6XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-677-7XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-687CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-688CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-688 is split into 1,000-number blocks - detail below
925-688-0XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-688-1XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-688-2XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-688-3XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-688-4XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-688-5XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-688-7XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-688-8XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-688-9XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-689CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-691CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-692CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-798CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-808CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-808 is split into 1,000-number blocks - detail below
925-808-2XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-808-4XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-808-6XXXCAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS0N/APrefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-825CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
925-969CAPACIFIC BELL (AT&T)N/A9740CONCORDCNCRCA01DS000/00/0000Prefix Type: RBOC
Switch Name: CONCORD
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: San Francisco CA (722)
Tandem: N/A
🔧 Explore Switch(CLLI: CNCRCA01DS0))
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