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
2019-04-15 603-419-2XXX 2000–2999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK NH
2019-04-15 603-419-3XXX 3000–3999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK NH
2019-04-15 603-832-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 LACONIA NH
2019-04-01 603-484-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NASHUA NH
2019-03-26 603-379-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 RYE BEACH NH
2019-03-26 603-704-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 DERRY NH
2019-03-26 603-704-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 DERRY NH
2019-03-19 603-270-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK NH
2019-03-14 603-406-4XXX 4000–4999Assigned BELL ATLANTIC MOBILE, INC 6386 CONCORD NH
2019-03-07 603-406-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 CONCORD NH
2019-03-04 603-587-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 CANDIA NH
2019-02-28 603-506-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MANCHESTER NH
2019-02-28 603-605-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DOVER NH
2019-02-28 603-685-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J SALEM NH
2019-02-21 603-636-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GROVETON NH
2019-02-21 603-838-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LISBON NH
2019-01-11 603-353-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 ORFORD NH
2019-01-11 603-904-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 WALPOLE NH
2018-12-28 603-368-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 PORTSMOUTH NH
2018-12-26 603-370-6XXX 6000–6999Assigned BELL ATLANTIC MOBILE, INC 6386 CANDIA NH
2018-12-26 603-406-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CONCORD NH
2018-12-26 603-416-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 RAYMOND NH
2018-12-26 603-483-9XXX 9000–9999Assigned BELL ATLANTIC MOBILE, INC 6386 CANDIA NH
2018-12-20 603-932-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 MANCHESTER NH
2018-11-21 603-945-9XXX 9000–9999Assigned ONVOY, LLC - NH 637E MANCHESTER NH
2018-11-07 603-333-8XXX 8000–8999Assigned VONAGE AMERICA LLC 197D CONCORD NH
2018-11-07 603-333-9XXX 9000–9999Assigned VONAGE AMERICA LLC 197D CONCORD NH
2018-11-07 603-450-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D CONCORD NH
2018-11-07 603-450-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D CONCORD NH
2018-11-07 603-450-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D CONCORD NH
2018-11-07 603-450-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D CONCORD NH
2018-11-07 603-450-5XXX 5000–5999Assigned VONAGE AMERICA LLC 197D CONCORD NH
2018-11-07 603-450-6XXX 6000–6999Assigned VONAGE AMERICA LLC 197D CONCORD NH
2018-11-07 603-450-7XXX 7000–7999Assigned VONAGE AMERICA LLC 197D CONCORD NH
2018-11-07 603-450-8XXX 8000–8999Assigned VONAGE AMERICA LLC 197D CONCORD NH
2018-11-05 603-803-2XXX 2000–2999Assigned BELL ATLANTIC MOBILE, INC 6386 KEENE NH
2018-10-30 603-506-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANCHESTER NH
2018-10-30 603-506-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANCHESTER NH
2018-10-26 603-386-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 SALEM NH
2018-10-24 603-503-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LANCASTER NH
2018-10-16 603-384-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 GOFFSTOWN NH
2018-10-09 603-404-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DERRY NH
2018-10-04 603-519-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 EXETER NH
2018-10-04 603-558-7XXX 7000–7999Assigned BELL ATLANTIC MOBILE, INC 6386 CLAREMONT NH
2018-09-19 603-333-7XXX 7000–7999Assigned METROPCS, INC. 5562 CONCORD NH
2018-09-12 603-450-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CONCORD NH
2018-09-11 603-370-4XXX 4000–4999Assigned BELL ATLANTIC MOBILE, INC 6386 CANDIA NH
2018-09-10 603-386-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 SALEM NH
2018-09-10 603-670-6XXX 6000–6999Assigned BELL ATLANTIC MOBILE, INC 6386 MERRIMACK NH
2018-09-10 603-678-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 LEBANON 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.