NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

21 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2019-01-29 559-546-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SANGER CA
2019-01-29 559-546-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SANGER CA
2019-01-29 559-566-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C THREERIVRS CA
2019-01-29 559-566-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C THREERIVRS CA
2019-01-29 559-574-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C PARLIER CA
2019-01-29 559-574-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C PARLIER CA
2019-01-29 559-717-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C AVENAL CA
2019-01-29 559-717-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C AVENAL CA
2019-01-29 559-742-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C RIVERDALE CA
2019-01-29 559-742-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C RIVERDALE CA
2019-01-29 559-745-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SEQUOIA CA
2019-01-29 559-745-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SEQUOIA CA
2019-01-29 559-794-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C HANFORD CA
2019-01-29 559-794-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C HANFORD CA
2019-01-29 559-794-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C HANFORD CA
2019-01-29 559-819-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SELMA CA
2019-01-29 559-819-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SELMA CA
2019-01-29 559-838-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C EXETER CA
2019-01-29 559-838-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C EXETER CA
2019-01-29 559-963-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LATON CA
2019-01-29 559-963-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LATON CA
2019-01-29 559-991-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C TULARE CA
2019-01-23 559-615-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K PORTERVL CA
2019-01-15 559-551-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C REEDLEY CA
2019-01-15 559-551-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C REEDLEY CA
2018-12-31 559-653-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOWLER CA
2018-11-20 559-712-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CLOVIS CA
2018-10-19 559-539-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPRINGVL CA
2018-10-10 559-539-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SPRINGVL CA
2018-10-10 559-561-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K THREERIVRS CA
2018-10-10 559-565-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SEQUOIA CA
2018-10-09 559-319-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRESNO CA
2018-10-08 559-755-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KERMAN CA
2018-10-02 559-596-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K DINUBA CA
2018-10-01 559-335-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F GRANTGROVE CA
2018-10-01 559-527-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TERRABELLA CA
2018-09-24 559-257-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SELMA CA
2018-09-24 559-330-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MADERA CA
2018-09-24 559-336-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MIRANTPHST CA
2018-09-24 559-340-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DUNLAP CA
2018-09-24 559-757-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PIXLEY CA
2018-09-19 559-319-2XXX 2000–2999Assigned METROPCS, INC. 5562 FRESNO CA
2018-09-19 559-319-3XXX 3000–3999Assigned METROPCS, INC. 5562 FRESNO CA
2018-09-19 559-319-4XXX 4000–4999Assigned METROPCS, INC. 5562 FRESNO CA
2018-09-19 559-837-7XXX 7000–7999Assigned METROPCS, INC. 5562 TULARE CA
2018-09-19 559-837-8XXX 8000–8999Assigned METROPCS, INC. 5562 TULARE CA
2018-09-18 559-319-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRESNO CA
2018-08-29 559-319-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRESNO CA
2018-08-17 559-775-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CHOWCHILLA CA
2018-08-14 559-413-5XXX 5000–5999Assigned METROPCS, INC. 5562 HANFORD CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.