NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

4 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2022-02-14 510-350-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H OKLD MN-PD CA
2022-02-14 510-373-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H OKLD ALMD CA
2022-02-14 510-383-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H OKLD TRNID CA
2022-02-14 510-705-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H OKLD BKLY CA
2021-11-18 510-721-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2021-11-18 510-721-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2021-11-18 510-721-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2021-11-18 510-721-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2021-11-18 510-721-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2021-11-18 510-721-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2021-11-18 510-721-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2021-11-18 510-721-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2021-11-18 510-721-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2021-11-18 510-721-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2021-11-16 510-661-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2021-11-16 510-979-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2021-10-12 510-831-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H RICHMOND CA
2021-10-12 510-868-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H OKLD BKLY CA
2021-10-12 510-892-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H HAYWARD CA
2021-10-12 510-892-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H HAYWARD CA
2021-09-30 510-596-5XXX 5000–5999Assigned SONIC TELECOM, LLC - CA 433E OKLD MN-PD CA
2021-09-28 510-665-9XXX 9000–9999Assigned TERRA NOVA TELECOM INC. 145J OKLD BKLY CA
2021-09-14 510-973-2XXX 2000–2999Assigned TELNYX LLC 073H OKLD BKLY CA
2021-09-10 510-592-2XXX 2000–2999Assigned COMMIO, LLC 939H HRCUL-RODE CA
2021-09-10 510-592-3XXX 3000–3999Assigned COMMIO, LLC 939H HRCUL-RODE CA
2021-09-08 510-916-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2021-09-08 510-973-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2021-08-27 510-903-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2021-08-27 510-951-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2021-08-27 510-951-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2021-08-26 510-951-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HAYWARD CA
2021-08-19 510-973-1XXX 1000–1999Assigned SONIC TELECOM, LLC - CA 433E OKLD BKLY CA
2021-08-18 510-951-3XXX 3000–3999Assigned COMMIO, LLC 939H HAYWARD CA
2021-08-18 510-951-4XXX 4000–4999Assigned COMMIO, LLC 939H HAYWARD CA
2021-08-13 510-904-5XXX 5000–5999Assigned SONIC TELECOM, LLC - CA 433E OKLD TRNID CA
2021-08-11 510-973-3XXX 3000–3999Assigned SONIC TELECOM, LLC - CA 433E OKLD BKLY CA
2021-08-05 510-951-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2021-08-05 510-951-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2021-08-03 510-836-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2021-08-03 510-836-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2021-08-03 510-853-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2021-08-03 510-869-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2021-07-27 510-788-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2021-06-17 510-973-5XXX 5000–5999Assigned SONIC TELECOM, LLC - CA 433E OKLD BKLY CA
2021-06-15 510-779-6XXX 6000–6999Assigned TERRA NOVA TELECOM INC. 145J ELSBR-PINL CA
2021-06-03 510-807-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2021-05-28 510-869-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 OKLD MN-PD CA
2021-05-09 510-870-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2021-05-09 510-870-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2021-05-07 510-947-4XXX 4000–4999Assigned SONIC TELECOM, LLC - CA 433E OKLD MN-PD CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.