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
220-205 ONVOY SPECTRUM, LLC 624H KILBOURNE OH
220-211 MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
220-217 TON80 COMMUNICATIONS, LLC 516J SUNBURY OH
220-230 TON80 COMMUNICATIONS, LLC 516J THORNVILLE OH
220-311 MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
220-411 MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
220-511 MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
220-555 MULTIPLE OCN LISTING MULT DIR ASST OH
220-611 MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
220-700 OH
220-711 MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
220-811 MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
220-911 MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
220-950 OH
220-958 OH
220-959 OH
220-976 OH
223-201 CORE COMMUNICATIONS, INC. - PA 3806 BIGLERVL PA
223-211 MULTIPLE OCN LISTING MULT PA
223-228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHAMBERSBG PA
223-234 ONVOY SPECTRUM, LLC 624H HARISBGZN1 PA
223-238 ONVOY, LLC - PA 547E AIRVILLE PA
223-311 MULTIPLE OCN LISTING MULT PA
223-317 TWILIO INTERNATIONAL, INC. 506J MANCHESTER PA
223-333 ONVOY, LLC - PA 547E LEBANON PA
223-411 MULTIPLE OCN LISTING MULT PA
223-511 MULTIPLE OCN LISTING MULT PA
223-555 MULTIPLE OCN LISTING MULT DIR ASST PA
223-563 TON80 COMMUNICATIONS, LLC 516J MARION PA
223-570 PA
223-611 MULTIPLE OCN LISTING MULT PA
223-700 PA
223-711 MULTIPLE OCN LISTING MULT PA
223-717 PA
223-811 MULTIPLE OCN LISTING MULT PA
223-888 ONVOY, LLC - PA 547E HALIFAX PA
223-911 MULTIPLE OCN LISTING MULT PA
223-950 PA
223-958 PA
223-959 PA
223-976 PA
224-206 ONVOY, LLC 224C LIBERTYVL IL
224-211 MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
224-272 TON80 COMMUNICATIONS, LLC 516J ZION IL
224-282 FIRST COMMUNICATIONS, LLC 460K NORTHBROOK IL
224-290 ONVOY, LLC 224C ELGIN IL
224-300 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DEERFIELD IL
224-306 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 NORTHBROOK IL
224-310 ONVOY, LLC 224C ARLIGTNHTS IL
224-311 MULTIPLE OCN LISTING MULT XXXXXXXXXX IL

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.