NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
— 603-215 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 BERLIN NH
— 603-216 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J DERRY NH
— 603-218 3XXX4XXX7XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J MANCHESTER NH
— 603-220 not yet reported which blocks → XXXXXXXXXX NH
— 603-221 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 NASHUA NH
— 603-222 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-223 7XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-224 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-225 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-226 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-227 6XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-228 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-229 2XXX8XXX9XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-230 0XXX2XXX8XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-232 0XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J MANCHESTER NH
— 603-233 7XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NASHUA NH
— 603-236 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CAMPTON NH
— 603-237 1XXX2XXX7XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 COLEBROOK NH
— 603-238 0XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J PLYMOUTH NH
— 603-239 0XXX1XXX2XXX3XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 WINCHESTER NH
— 603-240 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-242 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 TROY NH
— 603-244 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J RAYMOND NH
— 603-245 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PORTSMOUTH NH
— 603-246 2XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 WSTEWATSTN NH
— 603-247 5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DERRY NH
— 603-248 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DOVER NH
— 603-249 0XXX2XXX5XXX6XXX7XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MILFORD NH
— 603-250 5XXX6XXX7XXX8XXX · 3 holders which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 CENTER HBR NH
— 603-253 0XXX1XXX2XXX5XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CENTER HBR NH
— 603-254 0XXX1XXX which blocks → UNITED STATES CELLULAR - NH 6290 PLYMOUTH NH
— 603-256 1XXX2XXX5XXX7XXX9XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 WCHESTEFLD NH
— 603-257 0XXX2XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 PLAISTOW NH
— 603-259 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NH 4017 LITTLETON NH
— 603-261 0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks → UNITED STATES CELLULAR - NH 6290 MERRIMACK NH
— 603-262 0XXX1XXX2XXX3XXX4XXX5XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MERRIMACK NH
— 603-263 3XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 927H MANCHESTER NH
— 603-264 8XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MANCHESTER NH
— 603-265 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NEW BOSTON NH
— 603-266 5XXX7XXX8XXX9XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 TILTON NH
— 603-267 0XXX2XXX3XXX4XXX5XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 BELMONT NH
— 603-268 1XXX2XXX3XXX4XXX5XXX6XXX9XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 SUNCOOK NH
— 603-269 3XXX which blocks → UNION TEL. CO. 0049 CTRBARNSTE NH
— 603-270 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 SUNCOOK NH
— 603-271 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CONCORD NH
— 603-272 1XXX2XXX5XXX6XXX7XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PIERMONT NH
— 603-273 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 LACONIA NH
— 603-274 4XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 SO HAMPTON NH
— 603-275 3XXX4XXX5XXX7XXX8XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DERRY NH
— 603-276 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 W LEBANON NH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.