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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2017-09-29 628-249-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2017-09-29 628-249-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2017-09-25 628-219-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2017-09-25 628-219-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2017-09-25 628-219-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2017-09-25 628-219-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2017-09-20 628-240-9XXX 9000–9999Assigned METROPCS, INC. 5562 SAN RAFAEL CA
2017-09-06 628-219-5XXX 5000–5999Assigned SONIC TELECOM, LLC - CA 433E SNFC MT-EV CA
2017-09-06 628-219-7XXX 7000–7999Assigned SONIC TELECOM, LLC - CA 433E SNFC MT-EV CA
2017-08-21 628-218-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2017-08-21 628-218-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2017-08-21 628-218-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2017-08-21 628-218-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2017-08-21 628-218-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2017-08-15 628-209-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C NOVATO CA
2017-08-14 628-213-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2017-08-14 628-253-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2017-07-27 628-219-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2017-07-27 628-219-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2017-07-21 628-208-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2017-07-10 628-210-1XXX 1000–1999Assigned TELNYX LLC 073H INVERNESS CA
2017-06-29 628-208-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2017-06-26 628-241-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2017-06-22 628-246-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2017-06-22 628-867-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2017-06-16 628-218-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNFC CNTRL CA
2017-06-16 628-218-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNFC CNTRL CA
2017-06-16 628-218-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNFC CNTRL CA
2017-06-15 628-241-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2017-06-15 628-254-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAUSALITO CA
2017-06-15 628-256-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC MT-EV CA
2017-06-15 628-895-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2017-06-09 628-867-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2017-06-09 628-867-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2017-06-07 628-257-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MILLVALLEY CA
2017-06-07 628-867-3XXX 3000–3999Assigned SONIC TELECOM, LLC - CA 433E SNFC CNTRL CA
2017-06-07 628-867-4XXX 4000–4999Assigned SONIC TELECOM, LLC - CA 433E SNFC CNTRL CA
2017-06-07 628-867-6XXX 6000–6999Assigned SONIC TELECOM, LLC - CA 433E SNFC CNTRL CA
2017-06-05 628-208-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2017-06-05 628-208-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2017-05-31 628-216-8XXX 8000–8999Assigned TELNYX LLC 073H POINTREYES CA
2017-05-23 628-202-3XXX 3000–3999Assigned TELNYX LLC 073H BELVEDERE CA
2017-05-23 628-212-4XXX 4000–4999Assigned TELNYX LLC 073H CORTEMADRA CA
2017-05-23 628-238-6XXX 6000–6999Assigned TELNYX LLC 073H IGNACIO CA
2017-05-23 628-254-8XXX 8000–8999Assigned TELNYX LLC 073H SAUSALITO CA
2017-05-23 628-257-3XXX 3000–3999Assigned TELNYX LLC 073H MILLVALLEY CA
2017-05-19 628-227-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2017-05-19 628-253-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SAN RAFAEL CA
2017-05-19 628-254-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2017-05-19 628-895-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNFC CNTRL 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.