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 510
ONVOY, LLC - CA 3
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2018-07-03 510-609-0XXX 0000–0999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H RICHMOND CA
2018-07-03 510-650-4XXX 4000–4999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H ELSBR-PINL CA
2018-07-03 510-726-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H CROCKETT CA
2018-07-03 510-738-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H FRNK OLIVR CA
2018-07-03 510-955-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H OKLD TRNID CA
2018-06-28 510-650-3XXX 3000–3999Assigned TELNYX LLC 073H ELSBR-PINL CA
2018-06-22 510-989-0XXX 0000–0999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H OKLD BKLY CA
2018-06-20 510-603-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD FRTVL CA
2018-06-20 510-603-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD FRTVL CA
2018-06-20 510-603-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OKLD FRTVL CA
2018-06-12 510-989-9XXX 9000–9999Assigned SONIC TELECOM, LLC - CA 433E OKLD BKLY CA
2018-06-08 510-650-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2018-06-08 510-650-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2018-06-07 510-570-8XXX 8000–8999Assigned SONIC TELECOM, LLC - CA 433E OKLD BKLY CA
2018-05-31 510-518-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2018-05-31 510-518-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2018-05-24 510-603-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2018-05-08 510-324-5XXX 5000–5999Assigned METROPCS, INC. 5562 FRNK GRNLF CA
2018-05-08 510-518-8XXX 8000–8999Assigned METROPCS, INC. 5562 FRNK MAIN CA
2018-05-08 510-518-9XXX 9000–9999Assigned METROPCS, INC. 5562 FRNK MAIN CA
2018-05-08 510-941-6XXX 6000–6999Assigned METROPCS, INC. 5562 FRNK GRNLF CA
2018-05-04 510-738-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2018-04-30 510-605-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L HAYWARD CA
2018-04-30 510-949-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HRCUL-RODE CA
2018-04-11 510-609-8XXX 8000–8999Assigned METROPCS, INC. 5562 RICHMOND CA
2018-04-11 510-609-9XXX 9000–9999Assigned METROPCS, INC. 5562 RICHMOND CA
2018-04-05 510-955-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 OKLD TRNID CA
2018-03-26 510-920-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD MN-PD CA
2018-03-21 510-650-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2018-03-21 510-650-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2018-03-21 510-747-2XXX 2000–2999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2018-03-19 510-607-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OKLD MN-PD CA
2018-03-19 510-607-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
2018-03-19 510-607-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLD MN-PD CA
2018-03-19 510-920-0XXX 0000–0999Assigned SONIC TELECOM, LLC - CA 433E OKLD MN-PD CA
2018-03-14 510-929-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2018-03-14 510-929-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2018-03-07 510-519-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2018-03-07 510-519-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2018-03-07 510-519-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2018-03-07 510-519-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2018-03-07 510-519-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2018-03-07 510-603-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2018-03-07 510-603-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2018-03-07 510-603-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2018-03-07 510-603-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2018-03-07 510-603-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2018-03-07 510-853-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2018-03-07 510-858-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2018-03-07 510-858-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD 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.