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
2016-07-20 628-243-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN RAFAEL CA
2016-07-19 628-247-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-07-19 628-247-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-07-19 628-247-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-07-19 628-247-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-07-19 628-247-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-07-19 628-247-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-07-19 628-247-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-07-19 628-247-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-07-19 628-247-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-07-19 628-247-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2016-07-19 628-248-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2016-07-19 628-248-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2016-07-19 628-248-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2016-07-19 628-248-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2016-07-19 628-248-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2016-07-19 628-248-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2016-07-19 628-248-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2016-07-19 628-248-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2016-07-19 628-248-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2016-07-19 628-248-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC MT-EV CA
2016-07-15 628-243-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SAN RAFAEL CA
2016-07-15 628-252-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CORTEMADRA CA
2016-07-15 628-999-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-07-15 628-999-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-07-14 628-231-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-07-14 628-231-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-07-14 628-231-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-07-14 628-231-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-07-14 628-245-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2016-07-13 628-203-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C STNSN-BLNS CA
2016-07-13 628-203-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C STNSN-BLNS CA
2016-07-13 628-203-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C STNSN-BLNS CA
2016-07-12 628-229-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C POINTREYES CA
2016-07-12 628-229-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C POINTREYES CA
2016-07-11 628-241-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC JUNPR CA
2016-07-08 628-233-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-07-08 628-241-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2016-07-08 628-241-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2016-07-07 628-899-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC MT-EV CA
2016-07-05 628-202-0XXX 0000–0999Assigned IP HORIZON LLC 515J BELVEDERE CA
2016-07-05 628-204-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NICASIO CA
2016-07-05 628-238-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 IGNACIO CA
2016-07-05 628-241-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2016-07-05 628-241-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2016-07-05 628-252-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CORTEMADRA CA
2016-07-05 628-252-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CORTEMADRA CA
2016-06-30 628-225-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-06-30 628-225-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2016-06-30 628-225-7XXX 7000–7999Assigned 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.