Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX: 951

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-951 A Annapolis MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-951 0 Annapolis MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-951 2 Annapolis MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-951 3 Annapolis MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-951 4 Annapolis MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-951 5 Annapolis MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238      
443-951 6 Annapolis MD BLTMMDCHX7X  073H TELNYX LLC 238      
443-951 7 Annapolis MD BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-951 8 Annapolis MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238      
443-951 9 Annapolis MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.