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
2016-06-23 603-507-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NH
2016-06-23 603-854-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANCHESTER NH
2016-06-23 603-921-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASHUA NH
2016-06-13 603-417-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 NASHUA NH
2016-06-09 603-400-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HOLLIS NH
2016-06-08 603-301-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K CTROSSIPEE NH
2016-06-03 603-414-2XXX 2000–2999Assigned TDS METROCOM, LLC 520K SUNAPEE NH
2016-05-27 603-213-7XXX 7000–7999Assigned FREEDOM RING COMMUNICATIONS, LLC 8468 MILFORD NH
2016-05-27 603-404-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DERRY NH
2016-05-20 603-531-2XXX 2000–2999Assigned BELL ATLANTIC MOBILE, INC 6386 PORTSMOUTH NH
2016-05-20 603-782-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 MANCHESTER NH
2016-05-17 603-945-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MANCHESTER NH
2016-05-03 603-680-9XXX 9000–9999Assigned UNITED STATES CELLULAR - NH 6290 HILLSBORO NH
2016-04-29 603-941-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WOLFEBORO NH
2016-04-21 603-405-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 SOMERSWTH NH
2016-04-14 603-362-3XXX 3000–3999Assigned BELL ATLANTIC MOBILE, INC 6386 HAMPSTEAD NH
2016-04-06 603-706-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 RAYMOND NH
2016-03-30 603-487-7XXX 7000–7999Assigned BELL ATLANTIC MOBILE, INC 6386 NEW BOSTON NH
2016-03-25 603-338-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 KEENE NH
2016-03-25 603-715-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CONCORD NH
2016-03-23 603-507-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 ROCHESTER NH
2016-03-18 603-508-4XXX 4000–4999Assigned BELL ATLANTIC MOBILE, INC 6386 PELHAM NH
2016-03-11 603-392-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - NH 996E WINCHESTER NH
2016-03-11 603-417-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - NH 996E NASHUA NH
2016-03-11 603-460-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - NH 996E DEERFIELD NH
2016-03-11 603-931-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - NH 996E CONCORD NH
2016-02-26 603-213-2XXX 2000–2999Assigned BELL ATLANTIC MOBILE, INC 6386 MILFORD NH
2016-02-26 603-307-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 NO CONWAY NH
2016-02-26 603-497-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 GOFFSTOWN NH
2016-02-26 603-901-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 CONWAY NH
2016-02-25 603-400-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HOLLIS NH
2016-02-17 603-933-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 GREENFIELD NH
2016-02-11 603-417-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J NASHUA NH
2016-02-03 603-748-7XXX 7000–7999Assigned BELL ATLANTIC MOBILE, INC 6386 WARNER NH
2016-01-26 603-412-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 PLYMOUTH NH
2016-01-25 603-722-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 MANCHESTER NH
2016-01-25 603-851-7XXX 7000–7999Assigned BELL ATLANTIC MOBILE, INC 6386 MANCHESTER NH
2016-01-14 603-346-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PLYMOUTH NH
2016-01-14 603-346-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PLYMOUTH NH
2016-01-07 603-858-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 MANCHESTER NH
2016-01-07 603-931-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CONCORD NH
2016-01-06 603-200-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 NEWMARKET NH
2016-01-05 603-404-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 DERRY NH
2015-12-30 603-409-7XXX 7000–7999Assigned BELL ATLANTIC MOBILE, INC 6386 LACONIA NH
2015-12-30 603-507-4XXX 4000–4999Assigned BELL ATLANTIC MOBILE, INC 6386 ROCHESTER NH
2015-12-30 603-931-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 CONCORD NH
2015-12-30 603-931-2XXX 2000–2999Assigned BELL ATLANTIC MOBILE, INC 6386 CONCORD NH
2015-12-28 603-751-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 PELHAM NH
2015-12-23 603-341-6XXX 6000–6999Assigned BELL ATLANTIC MOBILE, INC 6386 MERRIMACK NH
2015-12-18 603-395-7XXX 7000–7999Assigned BELL ATLANTIC MOBILE, INC 6386 EXETER 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.