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 603
OMNIPOINT MIAMI E LICENSE, LLC 5
BELL ATLANTIC MOBILE, INC 4
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
2020-05-04 603-255-4XXX 4000–4999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2020-04-30 603-409-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J LACONIA NH
2020-04-23 603-255-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 MANCHESTER NH
2020-04-10 603-255-3XXX 3000–3999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2020-04-10 603-995-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 HENNIKER NH
2020-04-09 603-451-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CONCORD NH
2020-04-09 603-451-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CONCORD NH
2020-04-09 603-451-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CONCORD NH
2020-04-01 603-280-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 BARRINGTON NH
2020-04-01 603-504-9XXX 9000–9999Assigned UNITED STATES CELLULAR - NH 6290 CLAREMONT NH
2020-03-23 603-803-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 KEENE NH
2020-03-20 603-314-8XXX 8000–8999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2020-03-16 603-808-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANTRIM NH
2020-03-16 603-808-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANTRIM NH
2020-03-12 603-310-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 BEDFORD NH
2020-03-12 603-408-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 BERLIN NH
2020-03-06 603-413-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANCHESTER NH
2020-03-06 603-506-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANCHESTER NH
2020-03-06 603-506-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANCHESTER NH
2020-03-06 603-855-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 ALTON NH
2020-02-24 603-288-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J NASHUA NH
2020-02-20 603-255-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J MANCHESTER NH
2020-02-19 603-314-3XXX 3000–3999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2020-02-18 603-210-7XXX 7000–7999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK NH
2020-02-18 603-268-3XXX 3000–3999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK NH
2020-02-07 603-250-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 CENTER HBR NH
2020-02-07 603-654-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 WILTON NH
2020-02-07 603-839-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 FARMINGTON NH
2020-01-25 603-293-6XXX 6000–6999Assigned BELL ATLANTIC MOBILE, INC 6386 LACONIA NH
2020-01-23 603-541-7XXX 7000–7999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2020-01-16 603-258-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HOLLIS NH
2020-01-10 603-518-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANCHESTER NH
2020-01-08 603-212-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H SALEM NH
2019-12-16 603-406-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 CONCORD NH
2019-12-16 603-406-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 CONCORD NH
2019-12-10 603-800-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 MEREDITH NH
2019-12-09 603-800-0XXX 0000–0999Assigned FRACTEL, LLC 965H MEREDITH NH
2019-12-09 603-800-8XXX 8000–8999Assigned FRACTEL, LLC 965H MEREDITH NH
2019-12-09 603-999-9XXX 9000–9999Assigned FRACTEL, LLC 965H SALEM NH
2019-12-03 603-605-4XXX 4000–4999Assigned BELL ATLANTIC MOBILE, INC 6386 DOVER NH
2019-11-27 603-741-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 NEW BOSTON NH
2019-11-25 603-309-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 NEWPORT NH
2019-11-15 603-288-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 NASHUA NH
2019-11-15 603-722-6XXX 6000–6999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2019-11-15 603-836-9XXX 9000–9999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2019-11-13 603-680-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HILLSBORO NH
2019-11-13 603-680-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HILLSBORO NH
2019-11-06 603-263-5XXX 5000–5999Assigned PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 927H MANCHESTER NH
2019-10-30 603-606-9XXX 9000–9999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2019-10-30 603-935-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 MANCHESTER NH

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.