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
2017-12-18 603-333-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 CONCORD NH
2017-12-06 603-316-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 MILFORD NH
2017-12-06 603-333-1XXX 1000–1999Assigned PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 927H CONCORD NH
2017-11-29 603-531-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 PORTSMOUTH NH
2017-11-29 603-570-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 PORTSMOUTH NH
2017-11-28 603-288-1XXX 1000–1999Assigned PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 927H NASHUA NH
2017-11-28 603-507-6XXX 6000–6999Assigned PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 927H ROCHESTER NH
2017-11-22 603-722-3XXX 3000–3999Assigned BELL ATLANTIC MOBILE, INC 6386 MANCHESTER NH
2017-11-20 603-824-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SALEM NH
2017-11-15 603-716-9XXX 9000–9999Assigned PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 927H MANCHESTER NH
2017-11-15 603-854-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MANCHESTER NH
2017-11-09 603-417-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASHUA NH
2017-11-09 603-952-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SALEM NH
2017-10-31 603-901-2XXX 2000–2999Assigned BELL ATLANTIC MOBILE, INC 6386 CONWAY NH
2017-10-19 603-935-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J MANCHESTER NH
2017-10-19 603-935-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J MANCHESTER NH
2017-10-19 603-935-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J MANCHESTER NH
2017-10-17 603-316-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 MILFORD NH
2017-10-17 603-404-3XXX 3000–3999Assigned BELL ATLANTIC MOBILE, INC 6386 DERRY NH
2017-10-09 603-212-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 SALEM NH
2017-09-14 603-409-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LACONIA NH
2017-09-11 603-446-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 MARLOW NH
2017-09-07 603-277-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HANOVER NH
2017-09-07 603-915-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GORHAM NH
2017-09-01 603-605-8XXX 8000–8999Assigned PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 927H DOVER NH
2017-08-21 603-242-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TROY NH
2017-08-21 603-242-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TROY NH
2017-08-14 603-507-2XXX 2000–2999Assigned BELL ATLANTIC MOBILE, INC 6386 ROCHESTER NH
2017-08-14 603-803-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 KEENE NH
2017-08-07 603-901-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K CONWAY NH
2017-08-01 603-573-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 CONCORD NH
2017-07-31 603-299-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BARTLETT NH
2017-07-21 603-409-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 LACONIA NH
2017-07-20 603-440-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 MERRIMACK NH
2017-07-17 603-402-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 NASHUA NH
2017-07-17 603-484-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 NASHUA NH
2017-07-06 603-288-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D NASHUA NH
2017-07-05 603-487-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 NEW BOSTON NH
2017-06-30 603-937-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MEREDITH NH
2017-06-28 603-404-4XXX 4000–4999Assigned BELL ATLANTIC MOBILE, INC 6386 DERRY NH
2017-06-28 603-815-2XXX 2000–2999Assigned BELL ATLANTIC MOBILE, INC 6386 DURHAM NH
2017-06-27 603-605-0XXX 0000–0999Assigned PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 927H DOVER NH
2017-06-20 603-706-7XXX 7000–7999Assigned BELL ATLANTIC MOBILE, INC 6386 RAYMOND NH
2017-06-12 603-309-4XXX 4000–4999Assigned BELL ATLANTIC MOBILE, INC 6386 NEWPORT NH
2017-06-06 603-714-6XXX 6000–6999Assigned BELL ATLANTIC MOBILE, INC 6386 BEDFORD NH
2017-06-06 603-775-3XXX 3000–3999Assigned BELL ATLANTIC MOBILE, INC 6386 EXETER NH
2017-05-22 603-931-9XXX 9000–9999Assigned BELL ATLANTIC MOBILE, INC 6386 CONCORD NH
2017-05-15 603-205-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PORTSMOUTH NH
2017-05-15 603-484-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NASHUA NH
2017-05-03 603-210-3XXX 3000–3999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK 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.