NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 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)

Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.

Most active assignees, last 30 days
8X8, INC. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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-NXXAssigneeOCNRate centerState
740-353 FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
740-354 FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
740-355 FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
740-356 FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
740-357 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORTSMOUTH OH
740-358 AERIAL COMMUNICATIONS, INC. 6701 MT VERNON OH
740-359 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STCLAIRSVL OH
740-360 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARION OH
740-361 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARION OH
740-362 FRONTIER NORTH, INC. - OH 0615 DELAWARE OH
740-363 FRONTIER NORTH, INC. - OH 0615 DELAWARE OH
740-364 WINDSTREAM OHIO, LLC 0665 NEWARK OH
740-366 WINDSTREAM OHIO, LLC 0665 NEWARK OH
740-367 OHIO BELL TEL CO 9321 CHESHIRE OH
740-368 FRONTIER NORTH, INC. - OH 0615 DELAWARE OH
740-369 FRONTIER NORTH, INC. - OH 0615 DELAWARE OH
740-372 FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
740-373 OHIO BELL TEL CO 9321 MARIETTA OH
740-374 OHIO BELL TEL CO 9321 MARIETTA OH
740-375 FRONTIER NORTH, INC. - OH 0615 MARION OH
740-376 OHIO BELL TEL CO 9321 MARIETTA OH
740-377 OHIO BELL TEL CO 9321 IRONTON OH
740-378 WINDSTREAM WESTERN RESERVE, INC. 0666 COOLVILLE OH
740-379 OHIO BELL TEL CO 9321 WALNUT OH
740-380 FRONTIER NORTH, INC. - OH 0615 LOGAN OH
740-381 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 STEUBENVL OH
740-382 FRONTIER NORTH, INC. - OH 0615 MARION OH
740-383 FRONTIER NORTH, INC. - OH 0615 MARION OH
740-384 FRONTIER NORTH, INC. - OH 0615 WELLSTON OH
740-385 FRONTIER NORTH, INC. - OH 0615 LOGAN OH
740-386 FRONTIER NORTH, INC. - OH 0615 MARION OH
740-387 FRONTIER NORTH, INC. - OH 0615 MARION OH
740-388 OHIO BELL TEL CO 9321 VINTON OH
740-389 FRONTIER NORTH, INC. - OH 0615 MARION OH
740-390 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT VERNON OH
740-391 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 STCLAIRSVL OH
740-392 BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 MT VERNON OH
740-393 BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 MT VERNON OH
740-394 OHIO BELL TEL CO 9321 SHAWNEE OH
740-395 FRONTIER NORTH, INC. - OH 0615 JACKSON OH
740-396 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARION OH
740-397 BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 MT VERNON OH
740-398 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MT VERNON OH
740-399 BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 MT VERNON OH
740-401 OHIO BELL TEL CO 9321 BELPRE OH
740-404 AERIAL COMMUNICATIONS, INC. 6701 NEWARK OH
740-405 AERIAL COMMUNICATIONS, INC. 6701 NEWARK OH
740-406 AERIAL COMMUNICATIONS, INC. 6701 WSNGTNCTHS OH
740-407 AERIAL COMMUNICATIONS, INC. 6701 LANCASTER OH
740-408 AERIAL COMMUNICATIONS, INC. 6701 ZANESVILLE OH

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.