NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

4 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 707
ONVOY, LLC - CA 2
NEW CINGULAR WIRELESS PCS, LLC 1
BANDWIDTH.COM CLEC, LLC - CA 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
2013-07-08 707-728-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J GUERNEVL CA
2013-07-08 707-883-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J UPPER LAKE CA
2013-06-28 707-355-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MIDDLETOWN CA
2013-06-21 707-346-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 NAPA CA
2013-06-19 707-978-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SANTA ROSA CA
2013-06-04 707-413-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LAKEPORT CA
2013-05-31 707-460-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 CRESCENTCY CA
2013-05-29 707-734-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FORT BRAGG CA
2013-05-28 707-346-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NAPA CA
2013-05-28 707-354-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WILLITS CA
2013-05-28 707-389-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FRFLD-SUIS CA
2013-05-28 707-782-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PTLM MAIN CA
2013-05-28 707-978-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SANTA ROSA CA
2013-05-23 707-389-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRFLD-SUIS CA
2013-05-23 707-561-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VALLEJO CA
2013-05-15 707-230-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ROSA CA
2013-05-15 707-230-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ROSA CA
2013-05-15 707-230-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ROSA CA
2013-05-15 707-230-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ROSA CA
2013-05-14 707-724-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C VACAVILLE CA
2013-05-08 707-671-9XXX 9000–9999Assigned SONIC TELECOM, LLC - CA 433E UKIAH CA
2013-05-01 707-932-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 GARBERVL CA
2013-04-25 707-346-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NAPA CA
2013-04-25 707-380-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 UKIAH CA
2013-04-25 707-398-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRFLD-SUIS CA
2013-04-25 707-559-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PTLM MAIN CA
2013-04-16 707-461-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 LOWER LAKE CA
2013-04-16 707-841-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WILLITS CA
2013-03-28 707-724-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VACAVILLE CA
2013-03-28 707-943-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MIRANDA CA
2013-03-27 707-306-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ANNAPOLIS CA
2013-03-27 707-306-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ANNAPOLIS CA
2013-03-27 707-379-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F VALLEYFORD CA
2013-03-27 707-379-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F VALLEYFORD CA
2013-03-20 707-487-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SMITHRIVER CA
2013-03-19 707-368-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LEGGETT CA
2013-03-19 707-620-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WINDSOR CA
2013-03-19 707-620-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WINDSOR CA
2013-03-19 707-622-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TMCV SERN CA
2013-03-19 707-635-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DIXON CA
2013-03-19 707-679-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DIXON CA
2013-03-19 707-771-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BENICIA CA
2013-03-19 707-785-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TMCV SERN CA
2013-03-19 707-986-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WHITETHORN CA
2013-03-19 707-986-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WHITETHORN CA
2013-03-18 707-262-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 LAKEPORT CA
2013-03-18 707-787-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PTLM MAIN CA
2013-03-14 707-230-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ROSA CA
2013-03-14 707-230-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SANTA ROSA CA
2013-03-14 707-380-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F UKIAH 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.