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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2006-10-11 916-517-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RSVL MAIN CA
2006-10-06 916-647-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ELK GROVE CA
2006-10-06 916-990-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2006-10-05 916-627-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2006-09-27 916-517-8XXX 8000–8999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2006-09-27 916-517-9XXX 9000–9999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2006-09-27 916-605-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2006-09-27 916-605-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FOLSOM CA
2006-09-27 916-893-2XXX 2000–2999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-09-27 916-893-3XXX 3000–3999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-09-27 916-893-4XXX 4000–4999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-09-26 916-880-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2006-09-14 916-335-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2006-09-14 916-627-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ELK GROVE CA
2006-09-14 916-647-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ELK GROVE CA
2006-09-13 916-588-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2006-09-13 916-588-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2006-09-13 916-588-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM MAIN CA
2006-09-13 916-647-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELK GROVE CA
2006-09-13 916-749-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2006-09-13 916-770-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RSVL MAIN CA
2006-09-13 916-880-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2006-09-13 916-880-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FAIR OAKS CA
2006-09-07 916-352-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C MICHIGNBAR CA
2006-09-07 916-778-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SO PLACER CA
2006-09-05 916-934-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2006-09-05 916-934-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2006-09-05 916-934-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FOLSOM CA
2006-08-30 916-295-7XXX 7000–7999Assigned METROPCS, INC. 5562 LINCOLN CA
2006-08-30 916-893-5XXX 5000–5999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-08-30 916-893-6XXX 6000–6999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-08-30 916-893-7XXX 7000–7999Assigned METROPCS, INC. 5562 SCRM MAIN CA
2006-08-23 916-418-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C SCRM NORTH CA
2006-08-22 916-627-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELK GROVE CA
2006-08-22 916-770-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RSVL MAIN CA
2006-08-18 916-303-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SO PLACER CA
2006-08-18 916-303-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SO PLACER CA
2006-08-18 916-307-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2006-08-18 916-307-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2006-08-18 916-415-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SO PLACER CA
2006-08-18 916-415-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SO PLACER CA
2006-08-18 916-864-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FAIR OAKS CA
2006-08-18 916-880-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FAIR OAKS CA
2006-08-16 916-583-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2006-08-16 916-583-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2006-08-15 916-749-6XXX 6000–6999Assigned METROPCS, INC. 5562 RSVL MAIN CA
2006-08-07 916-596-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2006-08-07 916-596-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM MAIN CA
2006-08-04 916-335-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIO LINDA CA
2006-08-04 916-749-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RSVL 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.