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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2019-10-29 603-403-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ROCHESTER NH
2019-10-18 603-922-2XXX 2000–2999Assigned BELL ATLANTIC MOBILE, INC 6386 NO STRATFD NH
2019-10-15 603-449-4XXX 4000–4999Assigned BELL ATLANTIC MOBILE, INC 6386 MILAN NH
2019-10-03 603-406-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CONCORD NH
2019-10-03 603-932-4XXX 4000–4999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2019-10-03 603-932-5XXX 5000–5999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2019-09-27 603-606-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H MANCHESTER NH
2019-09-26 603-519-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EXETER NH
2019-09-10 603-403-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 ROCHESTER NH
2019-09-10 603-506-4XXX 4000–4999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2019-09-10 603-506-5XXX 5000–5999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2019-09-10 603-814-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SEABROOK NH
2019-09-04 603-506-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 MANCHESTER NH
2019-08-30 603-276-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 W LEBANON NH
2019-08-20 603-210-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK NH
2019-08-20 603-210-9XXX 9000–9999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK NH
2019-08-20 603-268-6XXX 6000–6999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK NH
2019-08-20 603-268-9XXX 9000–9999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK NH
2019-08-20 603-368-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 PORTSMOUTH NH
2019-08-20 603-409-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 LACONIA NH
2019-08-20 603-484-5XXX 5000–5999Assigned BELL ATLANTIC MOBILE, INC 6386 NASHUA NH
2019-08-20 603-519-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 EXETER NH
2019-08-20 603-790-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 W LEBANON NH
2019-08-06 603-803-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - NH 996E KEENE NH
2019-07-25 603-506-6XXX 6000–6999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2019-07-16 603-933-9XXX 9000–9999Assigned BELL ATLANTIC MOBILE, INC 6386 GREENFIELD NH
2019-07-11 603-937-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 MEREDITH NH
2019-06-28 603-406-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CONCORD NH
2019-06-26 603-575-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 LITTLETON NH
2019-06-21 603-506-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 MANCHESTER NH
2019-06-14 603-270-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK NH
2019-06-14 603-485-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK NH
2019-06-07 603-519-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J EXETER NH
2019-06-07 603-967-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J HAMPTON NH
2019-05-30 603-419-5XXX 5000–5999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK NH
2019-05-22 603-368-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 PORTSMOUTH NH
2019-05-10 603-693-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 EPPING NH
2019-05-10 603-945-6XXX 6000–6999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2019-05-09 603-316-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 MILFORD NH
2019-04-24 603-604-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 RYE BEACH NH
2019-04-19 603-243-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 WOODSVILLE NH
2019-04-19 603-257-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 PLAISTOW NH
2019-04-19 603-287-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 CLAREMONT NH
2019-04-19 603-307-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 NO CONWAY NH
2019-04-19 603-403-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 ROCHESTER NH
2019-04-19 603-408-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 BERLIN NH
2019-04-19 603-575-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 LITTLETON NH
2019-04-19 603-684-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 LANCASTER NH
2019-04-19 603-971-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 RINDGE NH
2019-04-15 603-403-8XXX 8000–8999Assigned IDT AMERICA, CORP. - NH 314C ROCHESTER 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.