NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 916
T-MOBILE USA, INC. 446
ONVOY, LLC - CA 397
NEW CINGULAR WIRELESS PCS, LLC 374
METROPCS, INC. 362
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 331
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
2015-10-30 916-210-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J SCRM MAIN CA
2015-10-30 916-513-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ELK GROVE CA
2015-10-30 916-754-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM MAIN CA
2015-10-30 916-754-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM MAIN CA
2015-10-29 916-250-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SO PLACER CA
2015-10-29 916-398-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WALNUT GRV CA
2015-10-27 916-891-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM NORTH CA
2015-10-20 916-545-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2015-10-01 916-210-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2015-10-01 916-210-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2015-10-01 916-513-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2015-10-01 916-513-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2015-09-29 916-633-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FAIR OAKS CA
2015-09-29 916-756-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COURTLAND CA
2015-09-28 916-210-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2015-09-28 916-210-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2015-09-28 916-210-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2015-09-28 916-210-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2015-09-28 916-210-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2015-09-28 916-210-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SCRM MAIN CA
2015-09-28 916-755-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2015-09-28 916-755-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2015-09-23 916-513-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ELK GROVE CA
2015-09-22 916-891-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2015-09-22 916-891-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2015-09-22 916-891-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2015-09-15 916-490-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2015-09-15 916-490-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2015-09-11 916-472-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2015-09-10 916-490-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM MAIN CA
2015-09-10 916-490-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM MAIN CA
2015-09-08 916-547-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL CTHT CA
2015-09-08 916-547-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL CTHT CA
2015-09-03 916-513-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2015-09-03 916-513-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2015-09-03 916-840-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SCRM MAIN CA
2015-09-03 916-891-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C SCRM NORTH CA
2015-08-14 916-840-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2015-08-13 916-840-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2015-08-11 916-490-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2015-08-11 916-513-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2015-08-11 916-513-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2015-08-11 916-547-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL CTHT CA
2015-08-11 916-836-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2015-08-10 916-836-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2015-08-10 916-840-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SCRM MAIN CA
2015-08-04 916-513-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2015-08-04 916-513-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2015-07-31 916-620-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2015-07-31 916-620-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN 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.