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
2021-09-01 928-365-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H GREENEHVN AZ
2021-09-01 928-381-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H GRANDCNYON AZ
2021-09-01 928-389-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H EHRENBERG AZ
2021-09-01 928-394-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H BOUSE AZ
2021-09-01 928-397-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H CASTLEROCK AZ
2021-09-01 928-413-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H PIMA AZ
2021-09-01 928-418-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H KINGMAN AZ
2021-09-01 928-423-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H FLAGSTAFF AZ
2021-09-01 928-436-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H GILA BEND AZ
2021-09-01 928-693-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E PAGE AZ
2021-09-01 928-693-8XXX 8000–8999Assigned ONVOY, LLC - AZ 630E PAGE AZ
2021-09-01 928-701-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H GLOBE AZ
2021-09-01 928-859-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H SALOME AZ
2021-09-01 928-938-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H HYDER AZ
2021-08-24 928-418-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KINGMAN AZ
2021-08-23 928-340-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 SEDONA AZ
2021-08-23 928-423-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 FLAGSTAFF AZ
2021-08-23 928-423-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 FLAGSTAFF AZ
2021-08-23 928-423-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 FLAGSTAFF AZ
2021-08-23 928-423-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 FLAGSTAFF AZ
2021-08-23 928-423-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 FLAGSTAFF AZ
2021-08-23 928-593-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 SEDONA AZ
2021-08-23 928-593-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 SEDONA AZ
2021-08-12 928-231-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WICKENBURG AZ
2021-08-11 928-413-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PIMA AZ
2021-08-11 928-413-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PIMA AZ
2021-08-05 928-215-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 CLIFTON AZ
2021-08-05 928-215-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 CLIFTON AZ
2021-08-04 928-593-1XXX 1000–1999Assigned COMMIO, LLC 939H SEDONA AZ
2021-08-04 928-593-2XXX 2000–2999Assigned COMMIO, LLC 939H SEDONA AZ
2021-08-04 928-593-3XXX 3000–3999Assigned COMMIO, LLC 939H SEDONA AZ
2021-08-04 928-977-1XXX 1000–1999Assigned COMMIO, LLC 939H YUMA AZ
2021-08-04 928-977-3XXX 3000–3999Assigned COMMIO, LLC 939H YUMA AZ
2021-08-04 928-977-4XXX 4000–4999Assigned COMMIO, LLC 939H YUMA AZ
2021-08-04 928-977-5XXX 5000–5999Assigned COMMIO, LLC 939H YUMA AZ
2021-07-27 928-417-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SAFFORD AZ
2021-07-19 928-410-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GANADO AZ
2021-07-15 928-407-0XXX 0000–0999Assigned TELNYX LLC 073H WINDOWROCK AZ
2021-07-13 928-264-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E EHRENBERG AZ
2021-07-13 928-327-7XXX 7000–7999Assigned ONVOY, LLC - AZ 630E PRESCOTT AZ
2021-07-13 928-364-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E BLUE RIDGE AZ
2021-07-13 928-365-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E GREENEHVN AZ
2021-07-13 928-370-6XXX 6000–6999Assigned ONVOY, LLC - AZ 630E MARBLECNYN AZ
2021-07-13 928-371-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E MORMONLAKE AZ
2021-07-13 928-378-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E ROOSEVLTLK AZ
2021-07-13 928-381-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E GRANDCNYON AZ
2021-07-13 928-384-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E SUPAI AZ
2021-07-13 928-393-5XXX 5000–5999Assigned ONVOY, LLC - AZ 630E PIMA AZ
2021-07-13 928-393-9XXX 9000–9999Assigned ONVOY, LLC - AZ 630E PIMA AZ
2021-07-13 928-394-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E BOUSE 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.