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
— 607-223 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → TC SYSTEMS, INC. - NY 7140 OWEGO NY
— 607-225 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 GREENWOOD NY
— 607-226 6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GUILFORD NY
— 607-227 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ITHACA NY
— 607-228 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATKISGLEN NY
— 607-229 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ITHACA NY
— 607-231 not yet reported which blocks → PAETEC ITEL, LLC 829J BINGHAMTON NY
— 607-232 1XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BINGHAMTON NY
— 607-233 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → TC SYSTEMS, INC. - NY 7140 ITHACA NY
— 607-235 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J BINGHAMTON NY
— 607-237 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K BINGHAMTON NY
— 607-238 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 BINGHAMTON NY
— 607-240 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BINGHAMTON NY
— 607-241 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → YMAX COMMUNICATIONS CORP. - NY 282E ITHACA NY
— 607-242 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → TC SYSTEMS, INC. - NY 7140 BINGHAMTON NY
— 607-243 4XXX6XXX · 2 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 DUNDEE NY
— 607-245 0XXX1XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BINGHAMTON NY
— 607-246 0–9 XXXwhole prefix which blocks → ONVOY, LLC- NY 384C HAMMONDSPT NY
— 607-248 9XXX which blocks → VERIZON NEW YORK, INC. 9104 CORNING NY
— 607-249 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → TC SYSTEMS, INC. - NY 7140 WAVERLY NY
— 607-250 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → TC SYSTEMS, INC. - NY 7140 CORTLAND NY
— 607-251 0XXX1XXX2XXX3XXX4XXX8XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 BINGHAMTON NY
— 607-252 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TC SYSTEMS, INC. - NY 7140 ITHACA NY
— 607-253 not yet reported which blocks → TC SYSTEMS, INC. - NY 7140 ITHACA NY
— 607-254 0XXX which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-255 not yet reported which blocks → TC SYSTEMS, INC. - NY 7140 ITHACA NY
— 607-256 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-257 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-259 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ELMIRA NY
— 607-261 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 CORTLAND NY
— 607-262 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ITHACA NY
— 607-263 0XXX3XXX4XXX7XXX8XXX · 3 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 MORRIS NY
— 607-264 0XXX2XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 CHERRY VLY NY
— 607-265 0XXX1XXX4XXX5XXX · 2 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 MASONVILLE NY
— 607-266 1XXX6XXX which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-268 2XXX4XXX8XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K PRATTSBURG NY
— 607-269 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-271 0XXX1XXX5XXX6XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 ELMIRA NY
— 607-272 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-273 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-274 0XXX which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-275 4XXX5XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-276 0XXX1XXX3XXX4XXX7XXX · 2 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 ALMOND NY
— 607-277 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-278 0XXX1XXX2XXX3XXX4XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 DAVENPORT NY
— 607-279 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ITHACA NY
— 607-280 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ITHACA NY
— 607-281 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 HORNELL NY
— 607-284 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WAYNE NY
— 607-286 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 MILFORD NY

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.