Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31

ONVOY, LLC - CA 27

NEW CINGULAR WIRELESS PCS, LLC - IL 27

ONVOY, LLC - NJ 15

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
2011-08-10	971-229	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - OR	750E	PORTLAND	OR
2011-08-09	206-535	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	SEATTLE	WA
2011-08-09	225-280	0–9 XXXall 10 · 4 holders which blocks →	VOICESTREAM GSM I, LLC	150C	BATONROUGE	LA
2011-08-09	253-283	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	TACOMA	WA
2011-08-09	415-316	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	BELVEDERE	CA
2011-08-09	510-246	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	HAYWARD	CA
2011-08-09	530-353	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	OROVILLE	CA
2011-08-09	707-382	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	EUREKA	CA
2011-08-09	720-477	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - CO	026D	DENVER	CO
2011-08-09	720-499	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	DENVER	CO
2011-08-09	803-490	0–9 XXXall 10 · 5 holders which blocks →	WINDSTREAM SOUTH CAROLINA, INC.	0517	LEXINGTON	SC
2011-08-09	818-821	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	NO HOLLYWD	CA
2011-08-09	819-200	not yet reported which blocks →	Iristel Inc.	154E	Sherbrooke	—
2011-08-09	850-369	not yet reported which blocks →	COMCAST IP PHONE, LLC	318J	GREENWOOD	FL
2011-08-09	931-255	0–9 XXXall 10 · 4 holders which blocks →	POWERTEL NASHVILLE LICENSES, INC.	7476	BAXTER	TN
2011-08-09	951-373	0–9 XXXall 10 · 8 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	ARLINGTON	CA
2011-08-09	971-271	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR	5820	PORTLAND	OR
2011-08-08	201-249	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	FAIR LAWN	NJ
2011-08-08	248-639	0–9 XXXall 10 · 9 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	PONTIAC	MI
2011-08-08	248-878	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	TROY	MI
2011-08-08	269-447	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	KALAMAZOO	MI
2011-08-08	401-340	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI	6389	PROVIDENCE	RI
2011-08-08	405-434	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	SHAWNEE	OK
2011-08-08	513-431	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	CINCINNATI	OH
2011-08-08	614-381	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	COLUMBUS	OH
2011-08-08	848-221	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NJ	4804	TOMS RIVER	NJ
2011-08-08	937-702	0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 6 holders which blocks →	CINCINNATI BELL EXTENDED TERRITORIES LLC - OH	309B	BEAVERCREK	OH
2011-08-05	234-223	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	WARREN	OH
2011-08-05	248-558	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	CLARKSTON	MI
2011-08-05	347-714	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	NWYRCYZN03	NY
2011-08-05	347-906	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	NWYRCYZN08	NY
2011-08-05	575-291	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ROSWELL	NM
2011-08-05	581-700	not yet reported which blocks →	Iristel Inc.	154E	Quebec	—
2011-08-05	581-701	not yet reported which blocks →	Iristel Inc.	154E	Quebec	—
2011-08-05	616-419	0–9 XXXall 10 · 6 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	GRAND RPDS	MI
2011-08-05	705-806	not yet reported which blocks →	Iristel Inc.	154E	Sudbury	—
2011-08-05	709-700	not yet reported which blocks →	Iristel Inc.	154E	St. John's	—
2011-08-05	720-789	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CO	6118	DENVER	CO
2011-08-05	909-301	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	RIALTO	CA
2011-08-05	917-283	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	NWYRCYZN12	NY
2011-08-04	321-241	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - FL	982E	EAU GALLIE	FL
2011-08-04	321-245	0–9 XXXall 10 · 4 holders which blocks →	AT&T ENTERPRISES, LLC	516C	ORLANDO	FL
2011-08-04	347-201	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	NWYRCYZN14	NY
2011-08-04	347-508	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	NWYRCYZN10	NY
2011-08-04	401-327	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	PROVIDENCE	RI
2011-08-04	408-214	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	SAN MARTIN	CA
2011-08-04	408-780	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	SNJS WEST	CA
2011-08-04	415-340	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	SNFC MT-EV	CA
2011-08-04	513-394	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	CINCINNATI	OH
2011-08-04	513-399	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	CINCINNATI	OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.