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
2013-10-08 603-309-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J NEWPORT NH
2013-09-25 603-948-8XXX 8000–8999Assigned METROPCS, INC. 5562 ROCHESTER NH
2013-09-09 603-277-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HANOVER NH
2013-09-09 603-319-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J PORTSMOUTH NH
2013-09-09 603-402-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J NASHUA NH
2013-09-06 603-757-7XXX 7000–7999Assigned CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 KEENE NH
2013-09-05 603-552-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 DERRY NH
2013-09-05 603-933-2XXX 2000–2999Assigned BELL ATLANTIC MOBILE, INC 6386 GREENFIELD NH
2013-08-26 603-722-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MANCHESTER NH
2013-07-22 603-213-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MILFORD NH
2013-07-22 603-871-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J SANBORNVL NH
2013-07-18 603-937-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K MEREDITH NH
2013-07-09 603-678-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEBANON NH
2013-07-02 603-291-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 GREENVILLE NH
2013-07-02 603-758-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 HAMPTON NH
2013-06-26 603-395-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EXETER NH
2013-06-19 603-362-7XXX 7000–7999Assigned BELL ATLANTIC MOBILE, INC 6386 HAMPSTEAD NH
2013-06-19 603-573-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 CONCORD NH
2013-06-19 603-660-7XXX 7000–7999Assigned BELL ATLANTIC MOBILE, INC 6386 GOFFSTOWN NH
2013-06-19 603-921-4XXX 4000–4999Assigned BELL ATLANTIC MOBILE, INC 6386 NASHUA NH
2013-06-10 603-601-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J HAMPTON NH
2013-06-10 603-974-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PLAISTOW NH
2013-06-07 603-402-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J NASHUA NH
2013-05-21 603-268-1XXX 1000–1999Assigned BELL ATLANTIC MOBILE, INC 6386 SUNCOOK NH
2013-05-21 603-402-0XXX 0000–0999Assigned BELL ATLANTIC MOBILE, INC 6386 NASHUA NH
2013-05-21 603-583-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 EXETER NH
2013-05-08 603-260-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J DERRY NH
2013-05-08 603-824-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SALEM NH
2013-04-23 603-892-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 CONCORD NH
2013-04-18 603-402-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J NASHUA NH
2013-04-18 603-836-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MANCHESTER NH
2013-03-28 603-327-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 SALEM NH
2013-03-28 603-341-8XXX 8000–8999Assigned BELL ATLANTIC MOBILE, INC 6386 MERRIMACK NH
2013-03-28 603-439-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 KEENE NH
2013-03-28 603-852-4XXX 4000–4999Assigned BELL ATLANTIC MOBILE, INC 6386 KEENE NH
2013-03-28 603-923-7XXX 7000–7999Assigned BELL ATLANTIC MOBILE, INC 6386 ROCHESTER NH
2013-03-27 603-692-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SOMERSWTH NH
2013-03-25 603-402-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 NASHUA NH
2013-03-14 603-948-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NH
2013-02-28 603-200-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 NEWMARKET NH
2013-02-21 603-366-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J LACONIA NH
2013-02-21 603-836-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MANCHESTER NH
2013-02-21 603-941-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WOLFEBORO NH
2013-02-20 603-254-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PLYMOUTH NH
2013-02-19 603-637-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 BEDFORD NH
2013-02-12 603-793-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EXETER NH
2013-02-05 603-483-7XXX 7000–7999Assigned FREEDOM RING COMMUNICATIONS, LLC 8468 CANDIA NH
2013-01-30 603-273-7XXX 7000–7999Assigned BELL ATLANTIC MOBILE, INC 6386 LACONIA NH
2013-01-10 603-518-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J MANCHESTER NH
2013-01-02 603-573-6XXX 6000–6999Assigned BELL ATLANTIC MOBILE, INC 6386 CONCORD 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.