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
2018-09-26 628-230-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2018-09-26 628-230-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2018-09-26 628-230-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2018-09-24 628-210-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F INVERNESS CA
2018-09-24 628-214-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NOVATO CA
2018-09-24 628-216-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F POINTREYES CA
2018-09-17 628-263-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-09-17 628-502-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-09-17 628-502-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-09-04 628-261-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2018-09-04 628-261-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2018-08-31 628-259-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C IGNACIO CA
2018-08-29 628-244-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 BELVEDERE CA
2018-08-29 628-257-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2018-08-29 628-257-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C MILLVALLEY CA
2018-08-28 628-210-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C INVERNESS CA
2018-08-28 628-216-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C POINTREYES CA
2018-08-28 628-280-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNFC MT-EV CA
2018-08-28 628-561-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C STNSN-BLNS CA
2018-08-24 628-867-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2018-08-21 628-263-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2018-08-21 628-263-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2018-08-21 628-502-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-08-21 628-502-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-08-21 628-502-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-08-21 628-502-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-08-21 628-502-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-08-15 628-502-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J SNFC CNTRL CA
2018-08-15 628-502-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J SNFC CNTRL CA
2018-08-02 628-258-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NICASIO CA
2018-07-27 628-263-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2018-07-27 628-263-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2018-07-12 628-280-1XXX 1000–1999Assigned SONIC TELECOM, LLC - CA 433E SNFC MT-EV CA
2018-07-05 628-263-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2018-07-05 628-263-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2018-07-03 628-209-2XXX 2000–2999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H NOVATO CA
2018-07-03 628-210-2XXX 2000–2999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H INVERNESS CA
2018-07-03 628-212-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H CORTEMADRA CA
2018-07-03 628-216-6XXX 6000–6999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H POINTREYES CA
2018-07-03 628-240-8XXX 8000–8999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H SAN RAFAEL CA
2018-07-03 628-257-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H MILLVALLEY CA
2018-07-03 628-258-2XXX 2000–2999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H NICASIO CA
2018-07-03 628-259-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H IGNACIO CA
2018-07-03 628-263-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H SNFC CNTRL CA
2018-07-03 628-280-0XXX 0000–0999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H SNFC MT-EV CA
2018-07-03 628-363-3XXX 3000–3999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H SNFC JUNPR CA
2018-07-03 628-561-6XXX 6000–6999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H STNSN-BLNS CA
2018-06-20 628-280-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC MT-EV CA
2018-06-07 628-236-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C NOVATO CA
2018-05-31 628-867-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 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.