NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

21 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
2019-06-20 559-390-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C ALPAUGH CA
2019-06-20 559-390-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C ALPAUGH CA
2019-06-20 559-405-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C DEL REY CA
2019-06-20 559-484-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C TIPTON CA
2019-06-20 559-520-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C BURREL CA
2019-06-20 559-520-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C BURREL CA
2019-06-20 559-539-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SPRINGVL CA
2019-06-20 559-539-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SPRINGVL CA
2019-06-20 559-597-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LEMON COVE CA
2019-06-20 559-597-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LEMON COVE CA
2019-06-20 559-605-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C TULARE CA
2019-06-20 559-626-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ORANGECOVE CA
2019-06-20 559-626-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C ORANGECOVE CA
2019-06-20 559-694-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C FIREBAUGH CA
2019-06-20 559-702-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C WOODLAKE CA
2019-06-20 559-702-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C WOODLAKE CA
2019-06-20 559-888-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C DEL REY CA
2019-06-03 559-574-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PARLIER CA
2019-05-15 559-890-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C FRESNO CA
2019-05-15 559-890-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C FRESNO CA
2019-05-15 559-890-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C FRESNO CA
2019-05-15 559-890-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C FRESNO CA
2019-05-10 559-413-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 HANFORD CA
2019-05-10 559-769-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WOODLAKE CA
2019-04-24 559-538-7XXX 7000–7999Assigned TERRA NOVA TELECOM INC. 145J FRESNO CA
2019-04-12 559-235-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C DUNLAP CA
2019-04-12 559-630-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SANJOAQUIN CA
2019-04-11 559-491-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L HANFORD CA
2019-04-11 559-648-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L DINUBA CA
2019-04-08 559-605-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 TULARE CA
2019-04-08 559-605-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J TULARE CA
2019-04-02 559-608-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L VISALIA CA
2019-03-15 559-539-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SPRINGVL CA
2019-02-25 559-409-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C VISALIA CA
2019-02-25 559-409-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C VISALIA CA
2019-02-25 559-409-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C VISALIA CA
2019-02-25 559-409-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C VISALIA CA
2019-02-19 559-878-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRESNO CA
2019-02-19 559-878-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRESNO CA
2019-02-15 559-236-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C GRANTGROVE CA
2019-02-15 559-236-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C GRANTGROVE CA
2019-02-15 559-239-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LINDSAY CA
2019-02-15 559-245-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C MIRANTPHST CA
2019-02-15 559-245-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C MIRANTPHST CA
2019-02-15 559-249-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C ORANGECOVE CA
2019-02-15 559-332-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SQUAW VLY CA
2019-02-15 559-398-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C BADGER CA
2019-02-15 559-398-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C BADGER CA
2019-02-15 559-425-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C ORANGECOVE CA
2019-02-15 559-468-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C WOODLAKE 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.