NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 603
CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 247
BELL ATLANTIC MOBILE, INC 74
PAETEC ITEL, LLC 58
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 44
COMCAST IP PHONE, LLC 40
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2024-01-23 603-916 0XXX1XXX2XXX3XXX8XXX9XXX · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MEREDITH NH
2023-10-17 603-805 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 CONCORD NH
2023-08-31 603-804 0XXX2XXX4XXX8XXX9XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DOVER NH
2023-08-11 603-794 0XXX1XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LACONIA NH
2023-07-05 603-919 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 ROCHESTER NH
2023-02-27 603-720 1XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K TROY NH
2023-01-13 603-202 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CONCORD NH
2022-10-06 603-697 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J DOVER NH
2022-09-29 603-649 7XXX which blocks → COMCAST IP PHONE, LLC 318J JAFFREY NH
2022-09-13 603-207 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NH 637E DERRY NH
2022-09-13 603-713 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NH 637E NASHUA NH
2022-09-13 603-802 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NH 637E CONCORD NH
2022-09-01 603-619 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J LACONIA NH
2022-07-21 603-956 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D PORTSMOUTH NH
2022-04-21 603-633 0–9 XXXall 10 · 4 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 MILFORD NH
2022-04-21 603-857 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → LEAP TELECOM, LLC 616J SUNCOOK NH
2022-03-21 603-241 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DOVER NH
2022-01-13 603-825 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MANCHESTER NH
2021-09-20 603-850 0XXX3XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LISBON NH
2021-09-09 603-441 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J ROCHESTER NH
2021-06-29 603-584 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CONCORD NH
2021-06-01 603-810 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H NASHUA NH
2021-05-17 603-696 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NH 637E MANCHESTER NH
2021-03-02 603-710 0XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WASHINGTON NH
2021-02-24 603-688 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 927H CONCORD NH
2021-01-21 603-514 0–9 XXXall 10 · 5 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 NASHUA NH
2020-12-04 603-602 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 ROCHESTER NH
2020-11-27 603-457 0–9 XXXall 10 · 4 holders which blocks → IDT AMERICA, CORP. - NH 314C DOVER NH
2020-08-13 603-607 1XXX2XXX5XXX6XXX7XXX · 3 holders which blocks → NUSO, LLC 478J WCHESTEFLD NH
2020-06-15 603-500 0XXX1XXX5XXX7XXX · 3 holders which blocks → FRACTEL, LLC 965H TILTON NH
2020-06-15 603-900 0XXX1XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H NEWPORT NH
2020-05-29 603-600 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H MANCHESTER NH
2020-04-08 603-451 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CONCORD NH
2020-02-19 603-255 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J MANCHESTER NH
2019-12-09 603-800 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MEREDITH NH
2019-12-09 603-999 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H SALEM NH
2018-12-21 603-406 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CONCORD NH
2018-12-21 603-416 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 RAYMOND NH
2018-10-29 603-506 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANCHESTER NH
2018-10-04 603-519 0–9 XXXall 10 · 5 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 EXETER NH
2018-09-11 603-450 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CONCORD NH
2018-07-31 603-403 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J ROCHESTER NH
2017-12-27 603-368 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 PORTSMOUTH NH
2017-10-16 603-316 0–9 XXXall 10 · 2 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 MILFORD NH
2017-07-28 603-299 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BARTLETT NH
2017-07-05 603-288 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D NASHUA NH
2017-04-14 603-258 0XXX1XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 HOLLIS NH
2016-10-20 603-803 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J KEENE NH
2016-09-21 603-484 0–9 XXXall 10 · 5 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 NASHUA NH
2016-04-20 603-405 0XXX1XXX2XXX6XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 SOMERSWTH NH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.