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
2019-02-12 628-259-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2019-02-07 628-270-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2019-02-07 628-270-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2019-02-07 628-270-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2019-02-07 628-270-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2019-02-07 628-270-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2019-02-06 628-265-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E INVERNESS CA
2019-02-06 628-265-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E INVERNESS CA
2019-02-06 628-265-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E INVERNESS CA
2019-02-04 628-210-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E INVERNESS CA
2019-02-04 628-210-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E INVERNESS CA
2019-02-04 628-210-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E INVERNESS CA
2019-02-01 628-230-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2019-02-01 628-260-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2019-02-01 628-260-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2019-02-01 628-260-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2019-02-01 628-264-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2019-02-01 628-264-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2019-02-01 628-264-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2019-02-01 628-264-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2019-02-01 628-264-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2019-02-01 628-629-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2019-02-01 628-629-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2019-02-01 628-629-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2019-01-29 628-561-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 STNSN-BLNS CA
2019-01-24 628-212-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2019-01-24 628-212-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C CORTEMADRA CA
2019-01-24 628-262-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C BELVEDERE CA
2019-01-18 628-264-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-01-18 628-264-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-01-18 628-264-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2019-01-18 628-264-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-12-19 628-629-9XXX 9000–9999Assigned HD CARRIER LLC 321J SNFC CNTRL CA
2018-12-11 628-270-0XXX 0000–0999Assigned SONIC TELECOM, LLC - CA 433E SNFC MT-EV CA
2018-12-05 628-264-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-11-29 628-210-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2018-11-29 628-210-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2018-11-29 628-216-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C POINTREYES CA
2018-11-29 628-216-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C POINTREYES CA
2018-11-29 628-257-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2018-11-29 628-257-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2018-11-29 628-363-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2018-11-29 628-363-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNFC JUNPR CA
2018-11-05 628-262-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELVEDERE CA
2018-11-01 628-259-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L IGNACIO CA
2018-10-18 628-230-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-10-18 628-259-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F IGNACIO CA
2018-10-18 628-867-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-09-28 628-230-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2018-09-26 628-230-2XXX 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.