NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

9 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2004-10-12 928-542-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2004-10-11 928-255-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 FLAGSTAFF AZ
2004-10-08 928-208-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LKHAVASUCY AZ
2004-10-08 928-230-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LKHAVASUCY AZ
2004-10-08 928-303-0XXX 0000–0999Assigned METROPCS, INC. 5562 KINGMAN AZ
2004-10-08 928-446-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2004-10-07 928-785-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2004-08-26 928-388-0XXX 0000–0999Assigned METROPCS, INC. 5562 YUMA AZ
2004-08-26 928-388-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2004-08-26 928-388-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2004-08-26 928-388-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2004-08-25 928-202-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SEDONA AZ
2004-08-23 928-377-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KINGMAN AZ
2004-07-15 928-261-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2004-07-15 928-542-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2004-06-30 928-254-8XXX 8000–8999Assigned METROPCS, INC. 5562 SEDONA AZ
2004-06-30 928-642-8XXX 8000–8999Assigned METROPCS, INC. 5562 PRESCOTT AZ
2004-06-22 928-600-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FLAGSTAFF AZ
2004-06-15 928-208-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LKHAVASUCY AZ
2004-06-15 928-303-8XXX 8000–8999Assigned METROPCS, INC. 5562 KINGMAN AZ
2004-05-06 928-683-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 GILA BEND AZ
2004-03-30 928-249-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LKMHVRNCHS AZ
2004-03-29 928-257-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2004-03-29 928-542-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2004-03-26 928-218-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MEADVIEW AZ
2004-03-11 928-208-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LKHAVASUCY AZ
2004-03-02 928-208-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LKHAVASUCY AZ
2004-03-02 928-257-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YUMA AZ
2004-02-24 928-257-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2004-02-17 928-208-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LKHAVASUCY AZ
2004-02-17 928-208-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LKHAVASUCY AZ
2004-02-17 928-303-9XXX 9000–9999Assigned METROPCS, INC. 5562 KINGMAN AZ
2004-02-10 928-814-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 FLAGSTAFF AZ
2004-02-10 928-814-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 FLAGSTAFF AZ
2004-01-26 928-208-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LKHAVASUCY AZ
2004-01-26 928-446-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2003-12-05 928-257-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2003-12-01 928-273-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PRESCOTT AZ
2003-11-17 928-502-3XXX 3000–3999Assigned QWEST CORPORATION 9636 YUMA AZ
2003-11-17 928-502-4XXX 4000–4999Assigned QWEST CORPORATION 9636 YUMA AZ
2003-11-17 928-502-5XXX 5000–5999Assigned QWEST CORPORATION 9636 YUMA AZ
2003-11-17 928-502-6XXX 6000–6999Assigned QWEST CORPORATION 9636 YUMA AZ
2003-11-17 928-502-7XXX 7000–7999Assigned QWEST CORPORATION 9636 YUMA AZ
2003-11-17 928-502-8XXX 8000–8999Assigned QWEST CORPORATION 9636 YUMA AZ
2003-11-04 928-208-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LKHAVASUCY AZ
2003-11-04 928-257-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 YUMA AZ
2003-10-22 928-257-9XXX 9000–9999Assigned METROPCS, INC. 5562 YUMA AZ
2003-10-09 928-279-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KINGMAN AZ
2003-10-03 928-261-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 YUMA AZ
2003-09-05 928-279-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KINGMAN AZ

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.