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 928
INTRADO COMMUNICATIONS, LLC 3
CSC WIRELESS, LLC 2
AHOI LLC 2
NEW CINGULAR WIRELESS PCS, LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 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
2005-11-30 928-941-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2005-11-16 928-451-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SEDONA AZ
2005-11-04 928-814-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FLAGSTAFF AZ
2005-11-01 928-234-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BULLHEADCY AZ
2005-10-24 928-897-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KINGMAN AZ
2005-10-21 928-373-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2005-10-12 928-369-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PINETOP AZ
2005-09-30 928-328-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2005-09-30 928-328-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2005-09-14 928-451-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SEDONA AZ
2005-09-14 928-814-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 FLAGSTAFF AZ
2005-09-08 928-785-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 YUMA AZ
2005-09-08 928-814-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FLAGSTAFF AZ
2005-09-02 928-221-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FLAGSTAFF AZ
2005-08-26 928-792-5XXX 5000–5999Assigned QWEST CORPORATION 9636 SAFFORD AZ
2005-08-19 928-368-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PINETOP AZ
2005-08-17 928-310-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 FLAGSTAFF AZ
2005-08-17 928-451-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SEDONA AZ
2005-08-10 928-272-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E GRANDCNYON AZ
2005-08-10 928-272-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E GRANDCNYON AZ
2005-08-10 928-542-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 BULLHEADCY AZ
2005-08-10 928-766-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 YUCCA AZ
2005-08-10 928-769-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PEACH SPG AZ
2005-08-05 928-273-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PRESCOTT AZ
2005-07-29 928-550-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 SOMERTON AZ
2005-07-11 928-792-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAFFORD AZ
2005-07-07 928-542-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2005-07-05 928-345-7XXX 7000–7999Assigned METROPCS, INC. 5562 YUMA AZ
2005-07-05 928-662-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PARKER DAM AZ
2005-06-29 928-754-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 BULLHDCYN AZ
2005-06-29 928-788-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 MOHAVE VLY AZ
2005-06-24 928-941-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2005-06-16 928-846-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 LKHAVASUCY AZ
2005-06-16 928-846-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 LKHAVASUCY AZ
2005-06-10 928-303-4XXX 4000–4999Assigned METROPCS, INC. 5562 KINGMAN AZ
2005-06-10 928-368-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PINETOP AZ
2005-06-08 928-203-3XXX 3000–3999Assigned QWEST CORPORATION 9636 SEDONA AZ
2005-06-03 928-550-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SOMERTON AZ
2005-06-03 928-550-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SOMERTON AZ
2005-06-01 928-221-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 FLAGSTAFF AZ
2005-05-31 928-444-1XXX 1000–1999Assigned CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL 2172 BULLHEADCY AZ
2005-05-18 928-542-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2005-05-05 928-814-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FLAGSTAFF AZ
2005-05-02 928-388-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2005-04-29 928-554-4XXX 4000–4999Assigned CSC VOICE, LLC 612K SEDONA AZ
2005-04-15 928-336-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2005-04-13 928-202-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SEDONA AZ
2005-04-13 928-478-6XXX 6000–6999Assigned CSC VOICE, LLC 612K PAYSON AZ
2005-04-13 928-814-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 FLAGSTAFF AZ
2005-04-12 928-404-4XXX 4000–4999Assigned CSC VOICE, LLC 612K BULLHDCYN AZ

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.