NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

7 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 628
EXIANT COMMUNICATIONS LLC 3
ONVOY, LLC - CA 2
TELNYX LLC 1
OPENTACT INC. 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
2015-09-29 628-223-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-09-29 628-223-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-09-29 628-223-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-09-29 628-223-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-09-29 628-223-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-09-16 628-223-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2015-09-08 628-221-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-09-04 628-221-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2015-09-04 628-221-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2015-08-21 628-221-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2015-08-20 628-234-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C SAN RAFAEL CA
2015-08-14 628-221-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2015-08-14 628-221-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2015-08-14 628-221-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2015-08-13 628-221-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2015-07-20 628-221-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SNFC CNTRL CA
2015-07-16 628-234-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SAN RAFAEL CA
2015-07-14 628-221-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SNFC CNTRL CA
2015-07-07 628-500-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2015-07-07 628-500-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2015-07-07 628-500-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2015-07-07 628-500-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2015-07-07 628-500-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2015-07-07 628-500-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2015-07-07 628-500-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2015-07-01 628-200-9XXX 9000–9999Assigned IP HORIZON LLC 515J SNFC JUNPR CA
2015-07-01 628-777-0XXX 0000–0999Assigned IP HORIZON LLC 515J SNFC MT-EV CA
2015-06-23 628-200-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2015-06-23 628-200-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2015-06-10 628-200-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2015-06-09 628-777-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2015-06-03 628-200-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2015-06-03 628-200-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2015-06-02 628-206-0XXX 0000–0999Assigned PACIFIC BELL 9740 SNFC CNTRL CA
2015-06-02 628-206-1XXX 1000–1999Assigned PACIFIC BELL 9740 SNFC CNTRL CA
2015-06-02 628-206-2XXX 2000–2999Assigned PACIFIC BELL 9740 SNFC CNTRL CA
2015-06-02 628-206-3XXX 3000–3999Assigned PACIFIC BELL 9740 SNFC CNTRL CA
2015-06-02 628-206-4XXX 4000–4999Assigned PACIFIC BELL 9740 SNFC CNTRL CA
2015-06-02 628-206-5XXX 5000–5999Assigned PACIFIC BELL 9740 SNFC CNTRL CA
2015-06-02 628-206-6XXX 6000–6999Assigned PACIFIC BELL 9740 SNFC CNTRL CA
2015-06-02 628-206-7XXX 7000–7999Assigned PACIFIC BELL 9740 SNFC CNTRL CA
2015-06-02 628-206-8XXX 8000–8999Assigned PACIFIC BELL 9740 SNFC CNTRL CA
2015-06-02 628-206-9XXX 9000–9999Assigned PACIFIC BELL 9740 SNFC CNTRL CA
2015-05-14 628-200-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2015-04-29 628-242-3XXX 3000–3999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2015-04-29 628-242-4XXX 4000–4999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2015-04-29 628-242-5XXX 5000–5999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2015-04-29 628-242-8XXX 8000–8999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2015-04-29 628-242-9XXX 9000–9999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2015-04-20 628-234-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAN RAFAEL 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.