NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

22 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 559
NEW CINGULAR WIRELESS PCS, LLC 4
HD CARRIER LLC 4
EXIANT COMMUNICATIONS LLC 4
BANDWIDTH.COM CLEC, LLC - CA 4
OPENTACT 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
2021-06-24 559-833-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SELMA CA
2021-06-24 559-844-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C MIRANTPHST CA
2021-06-24 559-854-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C PORTERVL CA
2021-06-24 559-955-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C TIVYVALLEY CA
2021-06-24 559-966-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SPRINGVL CA
2021-06-23 559-609-0XXX 0000–0999Assigned TELNYX LLC 073H STRATFORD CA
2021-06-16 559-603-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2021-06-16 559-603-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2021-06-16 559-603-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRESNO CA
2021-06-16 559-603-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2021-06-16 559-860-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2021-05-28 559-603-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRESNO CA
2021-05-21 559-606-3XXX 3000–3999Assigned TWILIO INTERNATIONAL, INC. 506J FRESNO CA
2021-05-14 559-699-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 VISALIA CA
2021-05-14 559-699-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 VISALIA CA
2021-05-10 559-338-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C DUNLAP CA
2021-05-08 559-398-5XXX 5000–5999Assigned COMMIO, LLC 939H BADGER CA
2021-05-08 559-398-6XXX 6000–6999Assigned COMMIO, LLC 939H BADGER CA
2021-05-08 559-398-7XXX 7000–7999Assigned COMMIO, LLC 939H BADGER CA
2021-05-08 559-398-8XXX 8000–8999Assigned COMMIO, LLC 939H BADGER CA
2021-05-08 559-398-9XXX 9000–9999Assigned COMMIO, LLC 939H BADGER CA
2021-05-04 559-715-0XXX 0000–0999Assigned TON80 COMMUNICATIONS, LLC 516J CHOWCHILLA CA
2021-04-28 559-590-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DINUBA CA
2021-04-22 559-603-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H FRESNO CA
2021-04-22 559-603-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H FRESNO CA
2021-04-22 559-603-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H FRESNO CA
2021-04-19 559-616-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TULARE CA
2021-04-19 559-833-3XXX 3000–3999Assigned FRACTEL, LLC 965H SELMA CA
2021-04-16 559-966-6XXX 6000–6999Assigned FRACTEL, LLC 965H SPRINGVL CA
2021-04-14 559-379-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LINDSAY CA
2021-04-14 559-934-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COALINGA CA
2021-04-12 559-384-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C BURREL CA
2021-04-12 559-384-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C BURREL CA
2021-04-12 559-414-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C CORCORAN CA
2021-04-12 559-414-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C CORCORAN CA
2021-04-12 559-414-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C CORCORAN CA
2021-04-12 559-414-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C CORCORAN CA
2021-04-12 559-427-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C PIXLEY CA
2021-04-12 559-524-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SANGER CA
2021-04-12 559-524-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SANGER CA
2021-04-12 559-524-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SANGER CA
2021-04-12 559-532-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C WOODLAKE CA
2021-04-12 559-532-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C WOODLAKE CA
2021-04-12 559-744-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SPRINGVL CA
2021-04-12 559-876-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SANGER CA
2021-04-12 559-910-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C GRANTGROVE CA
2021-04-09 559-599-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CLOVIS CA
2021-04-09 559-599-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CLOVIS CA
2021-04-09 559-599-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CLOVIS CA
2021-04-09 559-599-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CLOVIS 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.