NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

9 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 6
NEW CINGULAR WIRELESS PCS, LLC 1
EXIANT COMMUNICATIONS 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
2011-09-07 707-999-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L VACAVILLE CA
2011-09-02 707-687-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L WINDSOR CA
2011-09-02 707-759-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRFLD-SUIS CA
2011-09-01 707-666-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L NAPA CA
2011-09-01 707-978-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANTA ROSA CA
2011-09-01 707-978-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANTA ROSA CA
2011-08-31 707-978-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SANTA ROSA CA
2011-08-30 707-863-2XXX 2000–2999Assigned METROPCS, INC. 5562 FRFLD-SUIS CA
2011-08-22 707-978-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ROSA CA
2011-08-15 707-439-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRFLD-SUIS CA
2011-08-15 707-603-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 NAPA CA
2011-08-09 707-382-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 EUREKA CA
2011-08-05 707-303-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ROSA CA
2011-08-05 707-772-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PTLM MAIN CA
2011-08-04 707-547-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SANTA ROSA CA
2011-08-03 707-500-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E NICE CA
2011-08-03 707-518-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WILLITS CA
2011-08-03 707-559-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PTLM MAIN CA
2011-08-03 707-652-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VALLEJO CA
2011-08-03 707-785-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E TMCV SERN CA
2011-08-03 707-931-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SONOMA CA
2011-08-03 707-999-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VACAVILLE CA
2011-08-02 707-335-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BRIDGEVL CA
2011-08-02 707-394-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E GUERNEVL CA
2011-08-02 707-726-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FORTUNA CA
2011-08-01 707-532-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LOLETA CA
2011-07-28 707-506-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C RIO DELL CA
2011-07-28 707-517-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C WEOTT CA
2011-07-28 707-602-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C MIRANDA CA
2011-07-28 707-809-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C MIDDLETOWN CA
2011-07-28 707-879-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C TOMALES CA
2011-07-22 707-273-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E EUREKA CA
2011-07-13 707-400-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BENICIA CA
2011-07-13 707-549-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CLERLAOAKS CA
2011-07-11 707-666-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NAPA CA
2011-07-11 707-759-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRFLD-SUIS CA
2011-06-30 707-412-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E GUALALA CA
2011-06-30 707-418-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LKBERRYESS CA
2011-06-15 707-273-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 EUREKA CA
2011-06-15 707-273-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 EUREKA CA
2011-06-08 707-840-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C ARCATA CA
2011-06-08 707-978-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SANTA ROSA CA
2011-06-07 707-861-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SEBASTOPOL CA
2011-06-01 707-883-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E UPPER LAKE CA
2011-05-27 707-200-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ST HELENA CA
2011-05-27 707-219-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E GARBERVL CA
2011-05-27 707-241-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PTLM MAIN CA
2011-05-27 707-241-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PTLM MAIN CA
2011-05-27 707-335-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BRIDGEVL CA
2011-05-27 707-340-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BODEGA BAY 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.