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
224-340 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
224-361 ILLINOIS BELL TEL CO 9329 DESPLAINES IL
224-365 ONVOY, LLC 224C NORTHBROOK IL
224-380 ONVOY SPECTRUM, LLC 624H PLATO CTR IL
224-400 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
224-411 MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
224-424 T-MOBILE USA, INC. 6529 LIBERTYVL IL
224-444 ILLINOIS BELL TEL CO 9329 LAKE VILLA IL
224-511 MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
224-550 T-MOBILE USA, INC. 6529 ELK GROVE IL
224-555 MULTIPLE OCN LISTING MULT DIR ASST IL
224-568 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HALF DAY IL
224-611 MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
224-639 ONVOY, LLC 224C NORTHBROOK IL
224-660 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 GLENVIEW IL
224-677 LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LAKEZURICH IL
224-700 IL
224-711 MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
224-765 ILLINOIS BELL TEL CO 9329 HIGHLANDPK IL
224-811 MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
224-847 IL
224-911 MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
224-938 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
224-950 IL
224-958 IL
224-959 IL
224-976 IL
225-201 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 BATONROUGE LA
225-202 NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BATONROUGE LA
225-203 LA
225-204 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX LA
225-205 VOICESTREAM GSM I, LLC 150C BATONROUGE LA
225-206 NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CONVENT LA
225-207 NUSO, LLC 732J BATONROUGE LA
225-209 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ALBANY LA
225-211 MULTIPLE OCN LISTING MULT XXXXXXXXXX LA
225-212 SPOK, INC. 6630 BATONROUGE LA
225-214 CENTURYLINK COMMUNICATIONS LLC - LA 7637 BATONROUGE LA
225-215 CENTURYLINK COMMUNICATIONS LLC - LA 7637 BATONROUGE LA
225-216 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 BATONROUGE LA
225-218 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 BATONROUGE LA
225-219 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 BATONROUGE LA
225-221 VOICESTREAM GSM I, LLC 150C BATONROUGE LA
225-222 BRIGHTSPEED OF LOUISIANA, LLC 0434 GREENSBURG LA
225-223 COMCAST IP PHONE, LLC 318J BATONROUGE LA
225-225 LA
225-226 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 BATONROUGE LA
225-227 COMMIO, LLC 939H BATONROUGE LA
225-229 NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BATONROUGE LA
225-231 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 BATONROUGE LA

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.