NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

4 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 510
ONVOY, LLC - CA 3
BANDWIDTH.COM CLEC, LLC - CA 1
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
2013-11-11 510-849-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2013-11-11 510-981-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2013-11-01 510-328-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C OKLD FRTVL CA
2013-11-01 510-328-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C OKLD FRTVL CA
2013-11-01 510-775-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD ALMD CA
2013-11-01 510-775-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD ALMD CA
2013-10-31 510-210-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RICHMOND CA
2013-10-31 510-359-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2013-10-30 510-680-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C RICHMOND CA
2013-10-30 510-680-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C RICHMOND CA
2013-10-23 510-359-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2013-10-11 510-817-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD MN-PD CA
2013-10-10 510-680-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RICHMOND CA
2013-10-09 510-680-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C RICHMOND CA
2013-10-04 510-727-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HAYWARD CA
2013-10-04 510-849-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD BKLY CA
2013-10-03 510-320-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2013-10-01 510-842-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2013-10-01 510-866-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2013-09-26 510-365-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2013-09-26 510-480-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2013-09-20 510-671-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD ALMD CA
2013-09-17 510-320-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FRNK MAIN CA
2013-09-12 510-320-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2013-09-09 510-750-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L HAYWARD CA
2013-09-09 510-853-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2013-09-09 510-853-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2013-09-09 510-857-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2013-09-09 510-883-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2013-09-06 510-957-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J OKLD TRNID CA
2013-09-06 510-990-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD BKLY CA
2013-08-30 510-362-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2013-08-30 510-671-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2013-08-30 510-671-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2013-08-26 510-417-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2013-08-23 510-327-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2013-08-23 510-598-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2013-08-21 510-328-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C OKLD FRTVL CA
2013-08-20 510-680-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RICHMOND CA
2013-08-07 510-844-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
2013-08-07 510-844-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
2013-08-06 510-362-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2013-08-06 510-362-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2013-08-06 510-362-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2013-08-05 510-808-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD MN-PD CA
2013-08-05 510-957-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD TRNID CA
2013-07-31 510-423-4XXX 4000–4999Assigned IP HORIZON LLC 515J OKLD BKLY CA
2013-07-30 510-283-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ELSBR-PINL CA
2013-07-30 510-990-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2013-07-26 510-957-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID 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.