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
410-531MDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212COLUMBIACLVLMDCERP000/00/0000Prefix Type: RBOC
Switch Name: COLUMBIA
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: CLVLMDCERP0))
410-988MDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212ELLICOTTCYCLVLMDCERP000/00/0000Prefix Type: RBOC
Switch Name: COLUMBIA
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: CLVLMDCERP0))
410-988 is split into 1,000-number blocks - detail below
410-988-9XXXMDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212ELLICOTTCYCLVLMDCERP0N/APrefix Type: RBOC
Switch Name: COLUMBIA
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: CLVLMDCERP0))
443-535MDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212COLUMBIACLVLMDCERP000/00/0000Prefix Type: RBOC
Switch Name: COLUMBIA
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: CLVLMDCERP0))
443-535 is split into 1,000-number blocks - detail below
443-535-0XXXMDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212COLUMBIACLVLMDCERP0N/APrefix Type: RBOC
Switch Name: COLUMBIA
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: CLVLMDCERP0))
443-535-8XXXMDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212COLUMBIACLVLMDCERP0N/APrefix Type: RBOC
Switch Name: COLUMBIA
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: CLVLMDCERP0))
443-535-9XXXMDVERIZON MARYLAND, INC. (Verizon Communications)0002166825RMD00029419212COLUMBIACLVLMDCERP0N/APrefix Type: RBOC
Switch Name: COLUMBIA
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
🔧 Explore Switch(CLLI: CLVLMDCERP0))
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