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Castro Valley, CA Area Codes: List, Map, and Phone Lookup

The city of Castro Valley is in the state of California. It has the following active area codes:

510

Castro Valley, CA has the following Exchanges (NXX)

NPA NXX Usage Company Name NXX Introduced Date
510 200 Wireless Metro Pcs, Inc. 11/12/2008
510 209 Wireless Sprint Spectrum L.p. 06/30/2001
510 244 Landline Bandwidth.com Clec, Llc - Ca 07/25/2011
510 246 Wireless Cellco Partnership Dba Verizon Wireless - Ca 08/09/2011
510 247 Landline Pacific Bell 02/04/1994
510 258 Landline Pacific Bell 08/20/2000
510 274 Landline Utility Telecom Group, Llc - Ca 10/13/1999
510 276 Landline Pacific Bell 02/04/1994
510 278 Landline Pacific Bell 02/04/1994
510 294 Wireless Sprint Spectrum L.p. 11/04/2011
510 300 Landline U.s. Telepacific Corp. - Ca 08/20/2000
510 303 Wireless New Cingular Wireless Pcs, Llc 01/25/1998
510 305 Wireless New Cingular Wireless Pcs, Llc 04/15/1996
510 312 Wireless American Messaging Services, Llc 01/14/2000
510 314 Wireless Sprint Spectrum L.p. 07/02/2007
510 315 Landline Broadwing Communications, Llc - Ca 05/10/1999
510 317 Landline Pacific Bell 02/04/1994
510 329 Wireless New Cingular Wireless Pcs, Llc 01/25/1998
510 330 Landline Neutral Tandem-california, Llc - Ca 12/28/2015
510 331 Wireless New Cingular Wireless Pcs, Llc 01/25/1998
510 340 Wireless Cellco Partnership Dba Verizon Wireless - Ca 05/04/2012
510 342 Landline Mpower Communications Corp - Ca 10/11/1997
510 359 Wireless Cellco Partnership Dba Verizon Wireless - Ca 08/17/2012
510 361 Landline Level 3 Telecom Of California, Lp - Ca 10/27/2014
510 362 Wireless T-mobile Usa, Inc. 05/16/2013
510 363 Wireless Cellco Partnership Dba Verizon Wireless - Ca 01/14/2008
510 370 Landline Peerless Network Of California, Llc - Ca 04/13/2012
510 372 Landline Matrix Telecom, Llc. Sii Tnci - Ca 10/13/1999
510 398 Landline Bandwidth.com Clec, Llc - Ca 08/17/2012
510 415 Wireless T-mobile Usa, Inc. 09/19/2001
510 427 Wireless Cellco Partnership Dba Verizon Wireless - Ca 03/03/2001
510 432 Wireless New Cingular Wireless Pcs, Llc 11/28/2001
510 461 Wireless New Cingular Wireless Pcs, Llc 08/21/2002
510 481 Landline Pacific Bell 02/04/1994
510 512 Landline T-mobile Usa, Inc. 08/14/1998
510 514 Landline Peerless Network Of California, Llc - Ca 09/19/2016
510 537 Landline Pacific Bell 02/04/1994
510 538 Landline Pacific Bell 02/04/1994
510 554 Wireless 33 Wireless Inc. 02/27/1999
510 566 Landline Cellco Partnership Dba Verizon Wireless - Ca 05/10/1999
510 576 Landline Xo California, Inc. 08/14/1998
510 581 Landline Pacific Bell 02/04/1994
510 582 Landline Pacific Bell 02/04/1994
510 583 Landline Pacific Bell 07/01/1996
510 584 Landline Mcimetro Access Transmission Services Llc 10/15/1996
510 586 Landline Comcast Phone Of California, Llc - Ca 04/01/1997
510 589 Wireless New Cingular Wireless Pcs, Llc 01/10/1996
510 591 Wireless American Messaging Services, Llc 02/27/1999
510 600 Landline Cf Communications, Llc Dba Telekenex - Ca 03/12/2012
510 606 Wireless Cellco Partnership Dba Verizon Wireless - Ca 08/10/2010
510 634 Wireless Cellco Partnership Dba Verizon Wireless - Ca 09/24/2014
510 674 Landline Broadvox-clec, Llc - Ca 11/03/2014
510 677 Landline Metro Pcs, Inc. 03/22/2001
510 688 Landline T-mobile Usa, Inc. 01/14/2000
510 690 Landline Pacific Bell 05/10/1999
510 695 Wireless Cellco Partnership Dba Verizon Wireless - Ca 08/17/2007
510 706 Wireless Metro Pcs, Inc. 08/22/2001
510 727 Landline Pacific Bell 02/04/1994
510 728 Landline Pacific Bell 07/04/1995
510 731 Landline Mci Worldcom Communications, Inc., Ca 04/15/1996
510 733 Landline Pacific Bell 02/04/1994
510 736 Wireless T-mobile Usa, Inc. 12/09/2013
510 750 Wireless Sprint Spectrum L.p. 06/13/2000
510 751 Landline Matrix Telecom, Llc. Sii Tnci - Ca 05/10/1999
510 754 Wireless Sprint Spectrum L.p. 05/17/2002
510 755 Wireless Sprint Spectrum L.p. 10/31/2000
510 760 Wireless Sprint Spectrum L.p. 11/20/1998
510 825 Wireless Sprint Spectrum L.p. 10/18/2001
510 826 Wireless New Cingular Wireless Pcs, Llc 12/09/2016
510 828 Wireless Cellco Partnership Dba Verizon Wireless - Ca 03/22/2001
510 856 Landline Allegiance Telecom, Inc. - Ca 06/13/2000
510 861 Wireless New Cingular Wireless Pcs, Llc 01/14/2000
510 862 Wireless New Cingular Wireless Pcs, Llc 01/14/2000
510 876 Landline At&t Corp. 03/27/2014
510 880 Landline Matrix Telecom, Llc. Sii Tnci - Ca 07/06/1997
510 881 Landline Pacific Bell 02/04/1994
510 884 Wireless Pacific Bell 02/04/1994
510 885 Landline Pacific Bell 02/11/1995
510 886 Landline Pacific Bell 02/04/1994
510 888 Landline Pacific Bell 02/04/1994
510 889 Landline Pacific Bell 02/04/1994
510 892 Landline Matrix Telecom, Llc. Sii Tnci - Ca 10/15/1996
510 901 Landline Bandwidth.com Clec, Llc - Ca 07/29/2016
510 909 Wireless Cellco Partnership Dba Verizon Wireless - Ca 07/22/1999
510 921 Landline Teleport Communications Group - San Francisco 04/15/1996
510 925 Landline Bandwidth.com Clec, Llc - Ca 09/18/2014
510 931 Landline O1 Communications, Inc. - Ca 07/22/1999
510 935 Wireless New Cingular Wireless Pcs, Llc 03/27/2014
510 962 Landline Level 3 Communications, Llc - Ca 07/22/1999
510 963 Wireless New Cingular Wireless Pcs, Llc 11/13/2015
510 999 Landline Cf Communications, Llc Dba Telekenex - Ca 10/22/2010

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