Recent prefix assignments

2 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)

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 — NPA 872

NEW CINGULAR WIRELESS PCS, LLC - IL 1

8X8, INC. 1

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

Recent NPA-NXX prefix assignments
Assigned	NPA-NXX	Thousands-blocks taken (last-4 opening)	Code holder	OCN	Rate center	State
2019-11-29	872-255	0–9 XXXall 10 · 5 holders which blocks →	VONAGE AMERICA LLC	197D	CHICGOZN04	IL
2019-11-04	872-250	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC	224C	CHICGOZN01	IL
2019-09-17	872-710	0–9 XXXall 10 · 2 holders which blocks →	ONVOY SPECTRUM, LLC	624H	CHICGOZN01	IL
2019-09-12	872-249	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IL	6115	CHICGOZN01	IL
2019-05-23	872-248	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	CHICGOZN08	IL
2019-02-13	872-246	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - IL	7136	CHICGOZN06	IL
2019-01-24	872-245	0–9 XXXall 10 · 3 holders which blocks →	VOIP INNOVATIONS, LLC	597F	CHICGOZN04	IL
2017-11-01	872-838	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC	224C	CHICGOZN05	IL
2017-10-11	872-348	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC	224C	CHICGOZN08	IL
2017-08-22	872-266	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC	224C	CHICGOZN08	IL
2017-06-06	872-870	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC	224C	CHICGOZN09	IL
2017-05-02	872-365	0–9 XXXall 10 · 6 holders which blocks →	COMMIO, LLC	939H	CHICGOZN02	IL
2016-09-08	872-804	0–9 XXXall 10 · 3 holders which blocks →	PEERLESS NETWORK OF ILLINOIS, LLC - IL	063E	CHICGOZN02	IL
2016-07-27	872-762	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF ILLINOIS, LLC - IL	063E	CHICGOZN06	IL
2016-07-26	872-760	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF ILLINOIS, LLC - IL	063E	CHICGOZN10	IL
2016-07-22	872-763	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	CHICGOZN06	IL
2016-07-21	872-769	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	CHICGOZN06	IL
2016-07-13	872-757	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN07	IL
2016-07-12	872-310	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN02	IL
2016-04-07	872-843	0–9 XXXwhole prefix which blocks →	ILLINOIS BELL TEL CO	9329	CHICGOZN04	IL
2015-12-28	872-772	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	CHICGOZN04	IL
2015-12-23	872-231	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC	224C	CHICGOZN05	IL
2015-12-23	872-304	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC	224C	CHICGOZN03	IL
2015-11-23	872-204	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC	224C	CHICGOZN08	IL
2015-11-23	872-219	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC	224C	CHICGOZN07	IL
2015-10-23	872-724	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN07	IL
2015-07-21	872-315	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN04	IL
2015-07-21	872-904	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN07	IL
2015-06-12	872-810	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	CHICGOZN02	IL
2015-05-22	872-308	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN06	IL
2015-03-30	872-903	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 TELECOM OF ILLINOIS, LLC - IL	138G	CHICGOZN09	IL
2015-03-13	872-302	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC	224C	CHICGOZN02	IL
2015-02-13	872-985	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 TELECOM OF ILLINOIS, LLC - IL	138G	CHICGOZN02	IL
2014-10-22	872-818	0–9 XXXall 10 · 3 holders which blocks →	AT&T ENTERPRISES, LLC	516C	CHICGOZN07	IL
2014-10-21	872-901	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	CHICGOZN07	IL
2014-10-13	872-731	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN07	IL
2014-10-07	872-267	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	CHICGOZN08	IL
2014-10-06	872-281	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	CHICGOZN06	IL
2014-10-03	872-814	0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CHICGOZN04	IL
2014-09-30	872-276	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	CHICGOZN06	IL
2014-09-30	872-817	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	CHICGOZN04	IL
2014-09-17	872-813	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	CHICGOZN05	IL
2014-08-15	872-241	0–9 XXXall 10 · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - IL	7136	CHICGOZN02	IL
2014-07-01	872-242	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	CHICGOZN04	IL
2014-05-15	872-254	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN08	IL
2014-05-15	872-307	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN08	IL
2014-05-05	872-256	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	CHICGOZN05	IL
2014-04-25	872-713	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	CHICGOZN04	IL
2014-03-17	872-229	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN08	IL
2014-03-17	872-251	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN08	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.