NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

24 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 530
ONVOY, LLC - CA 9
BANDWIDTH.COM CLEC, LLC - CA 6
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 4
OPENTACT INC. 3
T-MOBILE USA, INC. 2
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2012-10-16 530-737-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RED BLUFF CA
2012-10-16 530-762-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PARADISE CA
2012-10-16 530-797-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 GRIDLEY CA
2012-10-16 530-831-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PORTOLA CA
2012-10-16 530-988-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 ORLAND CA
2012-10-15 530-217-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBN MAIN CA
2012-10-12 530-563-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 TRUCKEE CA
2012-10-11 530-717-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHICO CA
2012-10-11 530-878-5XXX 5000–5999Assigned ASTOUND BROADBAND, LLC - CA 485E AUBN MAIN CA
2012-10-10 530-840-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RED BLUFF CA
2012-10-08 530-619-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J COLUSA CA
2012-10-08 530-770-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MARYSVILLE CA
2012-10-08 530-784-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WEAVERVL CA
2012-10-05 530-353-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OROVILLE CA
2012-10-01 530-695-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LIVE OAK CA
2012-09-28 530-434-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MARYSVILLE CA
2012-09-27 530-392-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AUBN MAIN CA
2012-09-18 530-360-3XXX 3000–3999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 ANDERSON CA
2012-09-17 530-900-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C CORNING CA
2012-09-17 530-900-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C CORNING CA
2012-09-14 530-379-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WOODLAND CA
2012-09-14 530-601-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DAVIS CA
2012-09-13 530-434-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MARYSVILLE CA
2012-09-13 530-717-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHICO CA
2012-09-10 530-312-7XXX 7000–7999Assigned METROPCS, INC. 5562 WOODLAND CA
2012-09-10 530-727-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K RED BLUFF CA
2012-08-27 530-215-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDDING CA
2012-08-24 530-215-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K REDDING CA
2012-08-24 530-600-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SOUTHTAHOE CA
2012-08-22 530-312-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WOODLAND CA
2012-08-22 530-353-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OROVILLE CA
2012-08-22 530-353-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OROVILLE CA
2012-08-21 530-797-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J GRIDLEY CA
2012-08-14 530-215-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J REDDING CA
2012-08-13 530-215-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDDING CA
2012-08-13 530-999-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDDING CA
2012-08-03 530-562-6XXX 6000–6999Assigned CSC VOICE, LLC 612K TRUCKEE CA
2012-07-24 530-434-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MARYSVILLE CA
2012-07-24 530-434-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MARYSVILLE CA
2012-07-23 530-665-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WOODLAND CA
2012-07-16 530-584-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NTAH THCY CA
2012-07-16 530-816-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHESTER CA
2012-07-13 530-433-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CHICO CA
2012-07-11 530-433-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHICO CA
2012-07-10 530-776-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANDERSON CA
2012-06-12 530-840-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RED BLUFF CA
2012-06-05 530-434-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MARYSVILLE CA
2012-06-01 530-512-5XXX 5000–5999Assigned ASTOUND BROADBAND, LLC - CA 485E COLFAX CA
2012-05-22 530-206-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PLVL KYBRZ CA
2012-05-18 530-215-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDDING CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.