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
2017-05-18 510-949-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2017-04-20 510-826-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2017-04-14 510-561-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD FRTVL CA
2017-04-10 510-424-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD FRTVL CA
2017-04-10 510-993-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD BKLY CA
2017-04-04 510-602-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2017-03-20 510-570-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2017-03-20 510-570-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2017-03-13 510-570-1XXX 1000–1999Assigned TELNYX LLC 073H OKLD BKLY CA
2017-03-13 510-660-6XXX 6000–6999Assigned TELNYX LLC 073H RICHMOND CA
2017-03-13 510-766-7XXX 7000–7999Assigned TELNYX LLC 073H FRNK MAIN CA
2017-03-13 510-826-4XXX 4000–4999Assigned TELNYX LLC 073H HAYWARD CA
2017-03-13 510-947-6XXX 6000–6999Assigned TELNYX LLC 073H OKLD MN-PD CA
2017-03-09 510-513-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2017-03-09 510-826-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2017-03-09 510-826-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2017-03-02 510-694-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2017-03-02 510-941-9XXX 9000–9999Assigned METROPCS, INC. 5562 FRNK GRNLF CA
2017-02-21 510-871-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD ALMD CA
2017-02-14 510-513-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2017-02-14 510-513-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2017-02-13 510-947-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2017-02-13 510-947-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2017-02-13 510-947-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2017-02-10 510-826-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2017-02-10 510-826-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2017-02-10 510-826-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2017-02-10 510-826-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2017-02-09 510-726-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CROCKETT CA
2017-02-01 510-871-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD ALMD CA
2017-02-01 510-906-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD ALMD CA
2017-01-17 510-871-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2017-01-10 510-963-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2016-12-13 510-424-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD FRTVL CA
2016-12-13 510-424-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD FRTVL CA
2016-12-13 510-640-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSBR-PINL CA
2016-12-13 510-822-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD TRNID CA
2016-12-13 510-822-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD TRNID CA
2016-12-13 510-906-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD ALMD CA
2016-12-13 510-906-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD ALMD CA
2016-12-12 510-941-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRNK GRNLF CA
2016-12-09 510-826-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2016-12-08 510-949-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HRCUL-RODE CA
2016-12-06 510-570-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD BKLY CA
2016-11-30 510-241-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2016-11-29 510-570-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD BKLY CA
2016-11-24 510-424-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2016-11-24 510-424-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2016-11-22 510-851-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2016-11-22 510-851-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C OKLD MN-PD 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.