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: 303 [Rate centres in NPA 303] [Dial plan for NPA 303]

Block: A

<< 1 2 3 4 5 6 7 8 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
303-504 A Denver CO DNVRCOSEDS0  9636 QWEST CORPORATION 656      
303-505 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-506 A Fort Lupton CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-507 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-508 A Denver CO ENWDCOVF0MD  9748 AMERICAN MESSAGING SERVICES, LLC 656      
303-509 A Denver CO ENWDCOVF0MD  9748 AMERICAN MESSAGING SERVICES, LLC 656      
303-510 A Denver CO ENWDCOVF0MD  9748 AMERICAN MESSAGING SERVICES, LLC 656      
303-512 A Denver CO DNVRCOSEDS0  9636 QWEST CORPORATION 656      
303-513 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-514 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-515 A Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-516 A Denver CO BLDRCOGBRS1  9636 QWEST CORPORATION 656      
303-517 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-518 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-519 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-520 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-521 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-522 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-523 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-524 A Denver CO AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-525 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-526 A Denver CO LKMTCOMADS1  9636 QWEST CORPORATION 656      
303-527 A Denver CO BLDRCOGBRS1  9636 QWEST CORPORATION 656      
303-528 A Denver CO ENWDCOVF0MD  9748 AMERICAN MESSAGING SERVICES, LLC 656      
303-529 A Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-530 A Denver CO BLDRCOGBRS1  9636 QWEST CORPORATION 656      
303-531 A Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-532 A Longmont CO   829J PAETEC ITEL, LLC 656      
303-533 A Denver CO BRFDCOMADS0  9636 QWEST CORPORATION 656      
303-534 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-535 A Fort Lupton CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-536 A Hudson CO HDSNCOMARS1  9636 QWEST CORPORATION 656      
303-537 A Denver CO AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-538 A Denver CO NGLNCOMADS0  9636 QWEST CORPORATION 656      
303-539 A Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-540 A Denver CO DNVRCOMAXTZ  6630 USA MOBILITY WIRELESS, INC. 656      
303-541 A Denver CO BLDRCOMADS0  9636 QWEST CORPORATION 656      
303-542 A Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-543 A Denver CO TEMACOMADS0  9636 QWEST CORPORATION 656      
303-544 A Denver CO BLDRCOMADS0  9636 QWEST CORPORATION 656      
303-545 A Denver CO BLDRCOMADS0  9636 QWEST CORPORATION 656      
303-546 A Denver CO BLDRCOMADS0  9636 QWEST CORPORATION 656      
303-547 A Denver CO DNVTCO56AMD  8465 GLOBAL CROSSING LOCAL SERVICES, INC. - CO 656      
303-548 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-549 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-550 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-551 A Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-552 A Denver CO DNVTCO56AMD  8465 GLOBAL CROSSING LOCAL SERVICES, INC. - CO 656      
303-553 A Denver CO DNVRCOMAXTZ  6630 USA MOBILITY WIRELESS, INC. 656      
303-554 A Denver CO TEMACOMADS0  9636 QWEST CORPORATION 656      
303-556 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-557 A Denver CO DNVTCO56AMD  8465 GLOBAL CROSSING LOCAL SERVICES, INC. - CO 656      
303-558 A Denver CO DNVTCO56AMD  8465 GLOBAL CROSSING LOCAL SERVICES, INC. - CO 656      
303-559 A Denver CO ENWDCOVF0MD  9748 AMERICAN MESSAGING SERVICES, LLC 656      
303-560 A Denver CO DNVRCOMAXTZ  6630 USA MOBILITY WIRELESS, INC. 656      
303-561 A Denver CO DNVRCONODS0  9636 QWEST CORPORATION 656      
303-562 A Denver CO DNVTCO56AMD  8465 GLOBAL CROSSING LOCAL SERVICES, INC. - CO 656      
303-563 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-564 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-565 A Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-566 A Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-567 A Denver CO IDSPCOMADS0  9636 QWEST CORPORATION 656      
303-568 A Denver CO AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-569 A Georgetown CO GRTWCOMARS1  9636 QWEST CORPORATION 656      
303-570 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-571 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-572 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-573 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-574 A Denver CO DNVRCOMBDS0  9636 QWEST CORPORATION 656      
303-575 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-576 A Denver CO DNVRCOMBDS0  9636 QWEST CORPORATION 656      
303-577 A Denver CO DNVRCOETPS0  3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
303-578 A Keenesburg CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-579 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-580 A Denver CO ENWDCOVF0MD  9748 AMERICAN MESSAGING SERVICES, LLC 656      
303-581 A Denver CO BLDRCOGBRS1  9636 QWEST CORPORATION 656      
303-582 A Denver CO CNCYCOMARS1  9636 QWEST CORPORATION 656      
303-583 A Denver CO AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-584 A Denver CO DNVRCOSEDS0  9636 QWEST CORPORATION 656      
303-585 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-586 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-587 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-588 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-589 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-590 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-591 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-592 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-593 A Denver CO AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-594 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-595 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-596 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-597 A Denver CO DNVRCOETPS0  3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
303-598 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-599 A Denver CO DNVRCOMAXTZ  6630 USA MOBILITY WIRELESS, INC. 656      
303-600 A Denver CO AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-601 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-602 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-603 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-604 A Denver CO DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-605 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      

<< 1 2 3 4 5 6 7 8 >>

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.