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
2017-05-02 603-851-9XXX 9000–9999Assigned BELL ATLANTIC MOBILE, INC 6386 MANCHESTER NH
2017-04-25 603-606-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J MANCHESTER NH
2017-04-25 603-915-2XXX 2000–2999Assigned BELL ATLANTIC MOBILE, INC 6386 GORHAM NH
2017-04-24 603-405-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SOMERSWTH NH
2017-04-17 603-258-9XXX 9000–9999Assigned METROPCS, INC. 5562 HOLLIS NH
2017-04-12 603-507-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 ROCHESTER NH
2017-04-05 603-213-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 MILFORD NH
2017-03-30 603-400-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HOLLIS NH
2017-03-06 603-351-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 GOFFSTOWN NH
2017-02-10 603-757-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 KEENE NH
2017-02-03 603-400-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 HOLLIS NH
2017-01-30 603-824-4XXX 4000–4999Assigned METROPCS, INC. 5562 SALEM NH
2017-01-23 603-405-2XXX 2000–2999Assigned FREEDOM RING COMMUNICATIONS, LLC 8468 SOMERSWTH NH
2017-01-18 603-957-9XXX 9000–9999Assigned BELL ATLANTIC MOBILE, INC 6386 PORTSMOUTH NH
2017-01-05 603-322-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 W LEBANON NH
2016-12-28 603-461-0XXX 0000–0999Assigned METROPCS, INC. 5562 MERRIMACK NH
2016-12-28 603-507-5XXX 5000–5999Assigned METROPCS, INC. 5562 ROCHESTER NH
2016-12-20 603-790-3XXX 3000–3999Assigned BELL ATLANTIC MOBILE, INC 6386 W LEBANON NH
2016-12-12 603-605-1XXX 1000–1999Assigned PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 927H DOVER NH
2016-12-06 603-409-8XXX 8000–8999Assigned UNITED STATES CELLULAR - NH 6290 LACONIA NH
2016-12-01 603-440-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 MERRIMACK NH
2016-11-16 603-484-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J NASHUA NH
2016-11-10 603-285-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 DOVER NH
2016-11-10 603-290-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CONCORD NH
2016-11-10 603-377-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 MERRIMACK NH
2016-11-10 603-404-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 DERRY NH
2016-11-10 603-858-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 MANCHESTER NH
2016-11-04 603-257-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 PLAISTOW NH
2016-11-04 603-684-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 LANCASTER NH
2016-11-04 603-702-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 KINGSTON NH
2016-10-31 603-307-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NO CONWAY NH
2016-10-24 603-212-6XXX 6000–6999Assigned BELL ATLANTIC MOBILE, INC 6386 SALEM NH
2016-10-21 603-803-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KEENE NH
2016-10-19 603-268-5XXX 5000–5999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK NH
2016-10-18 603-378-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J PLAISTOW NH
2016-10-11 603-307-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K NO CONWAY NH
2016-09-09 603-678-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEBANON NH
2016-09-06 603-773-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EXETER NH
2016-09-01 603-400-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HOLLIS NH
2016-08-17 603-417-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NASHUA NH
2016-08-12 603-593-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JAFFREY NH
2016-08-10 603-213-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MILFORD NH
2016-08-02 603-562-1XXX 1000–1999Assigned UNITED STATES CELLULAR - NH 6290 PETERBROGH NH
2016-07-22 603-266-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TILTON NH
2016-07-14 603-409-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LACONIA NH
2016-07-12 603-680-3XXX 3000–3999Assigned FIDIUM ENTERPRISE SERVICES, LLC 631H HILLSBORO NH
2016-07-08 603-476-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J CTRSANDWIH NH
2016-06-24 603-213-4XXX 4000–4999Assigned BELL ATLANTIC MOBILE, INC 6386 MILFORD NH
2016-06-23 603-260-7XXX 7000–7999Assigned BELL ATLANTIC MOBILE, INC 6386 DERRY NH
2016-06-23 603-309-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 NEWPORT 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.