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NPA: 240 [Rate centres in NPA 240] [Dial plan for NPA 240]

Block: A

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-301 A Clear Spring MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240      
240-302 A Laurel MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-303 A Washington Zone 16 MD   829J PAETEC ITEL, LLC 236   2025-04-02   
240-304 A Washington Zone 5 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-305 A Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-306 A Gaithersburg MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-307 A Emmitsburg MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2024-12-09   
240-308 A Damascus MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-309 A Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-310 A Hagerstown MD CMLDMDCM5MD  4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
240-312 A Washington Zone 5 MD   829J PAETEC ITEL, LLC 236   2025-04-02   
240-313 A Hagerstown MD HGTWMDHGDS0  9212 VERIZON MARYLAND, INC. 240      
240-314 A Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-315 A Frederick MD FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-316 A Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-317 A Lexington Park-Great Mills MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
240-318 A Washington Zone 16 MD CLTNMDCLDS0  9212 VERIZON MARYLAND, INC. 236      
240-319 A Laurel (Baltimore LATA) MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
240-320 A Waldorf MD   829J PAETEC ITEL, LLC 236   2025-04-02   
240-321 A Oakland MD CMLDMDCM5MD  4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
240-322 A McCoole MD HGTWMD53DS0  2593 CORE COMMUNICATIONS, INC.- MD 240      
240-323 A Emmitsburg MD HGTWMD53DS0  2593 CORE COMMUNICATIONS, INC.- MD 240      
240-324 A Ashton (Baltimore LATA) MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238      
240-325 A Damascus MD CHCHMDBEPS0  2593 CORE COMMUNICATIONS, INC.- MD 236   2024-01-16   
240-326 A Washington Zone 15 MD   829J PAETEC ITEL, LLC 236   2025-04-02   
240-327 A Gaithersburg MD CHCHMDBEPS0  2593 CORE COMMUNICATIONS, INC.- MD 236   2024-01-16   
240-328 A Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-329 A Hagerstown MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
240-330 A Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-331 A Washington Zone 3 MD SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-332 A Tompkinsville MD WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-333 A Washington Zone 2 MD   829J PAETEC ITEL, LLC 236   2025-04-02   
240-334 A Washington Zone 14 MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-335 A Washington Zone 14 MD   829J PAETEC ITEL, LLC 236   2025-04-02   
240-336 A Washington Zone 2 MD CHCHMDBEPS0  2593 CORE COMMUNICATIONS, INC.- MD 236   2024-01-16   
240-337 A Washington Zone 5 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-338 A Washington Zone 3 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-339 A Washington Zone 15 MD   829J PAETEC ITEL, LLC 236   2025-04-02   
240-340 A Washington Zone 2 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-341 A Buckeystown MD FRDRMDFRX7X  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 240      
240-342 A Ashton MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
240-343 A Hancock MD FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-344 A Frederick MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
240-345 A Ashton (Baltimore LATA) MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
240-346 A Waldorf MD BTVLMD12CMA  5562 METROPCS, INC. 236      
240-347 A Hagerstown MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
240-348 A Washington Zone 16 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-349 A La Plata MD   876D ONVOY, LLC - MD 236      
240-350 A Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-351 A Washington Zone 3 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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