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
2017-05-18 628-895-5XXX 5000–5999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SNFC CNTRL CA
2017-05-05 628-253-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2017-05-05 628-253-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2017-05-03 628-895-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2017-04-19 628-244-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2017-04-19 628-244-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2017-04-19 628-257-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2017-04-19 628-257-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2017-04-10 628-241-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC JUNPR CA
2017-03-29 628-867-5XXX 5000–5999Assigned COMMIO, LLC 939H SNFC CNTRL CA
2017-03-14 628-895-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J SNFC CNTRL CA
2017-03-13 628-234-2XXX 2000–2999Assigned TELNYX LLC 073H SAN RAFAEL CA
2017-03-13 628-256-4XXX 4000–4999Assigned TELNYX LLC 073H SNFC MT-EV CA
2017-03-13 628-895-9XXX 9000–9999Assigned TELNYX LLC 073H SNFC CNTRL CA
2017-02-27 628-256-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J SNFC MT-EV CA
2017-02-24 628-895-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2017-02-17 628-216-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C POINTREYES CA
2017-02-10 628-255-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2017-02-10 628-255-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2017-02-10 628-255-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2017-02-10 628-255-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2017-02-10 628-255-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2017-02-10 628-255-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2017-02-10 628-255-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2017-02-10 628-255-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2017-02-10 628-255-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2017-02-10 628-255-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2017-02-06 628-256-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2017-02-03 628-249-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2017-02-03 628-895-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2017-01-13 628-212-3XXX 3000–3999Assigned IP HORIZON LLC 515J CORTEMADRA CA
2017-01-13 628-216-9XXX 9000–9999Assigned IP HORIZON LLC 515J POINTREYES CA
2017-01-10 628-256-2XXX 2000–2999Assigned SONIC TELECOM, LLC - CA 433E SNFC MT-EV CA
2017-01-10 628-256-3XXX 3000–3999Assigned SONIC TELECOM, LLC - CA 433E SNFC MT-EV CA
2016-12-22 628-213-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-12-22 628-213-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-12-16 628-209-1XXX 1000–1999Assigned TELNYX LLC 073H NOVATO CA
2016-12-14 628-213-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2016-12-08 628-253-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2016-12-06 628-213-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2016-11-16 628-214-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C NOVATO CA
2016-11-14 628-204-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NICASIO CA
2016-11-07 628-208-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-11-07 628-208-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-11-07 628-208-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-11-07 628-208-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-11-07 628-208-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-11-07 628-217-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-11-07 628-217-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-11-07 628-217-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 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.