Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 26

Rogers Communications Canada Inc. (Wireless) 23

NEW CINGULAR WIRELESS PCS, LLC - IL 22

ONVOY, LLC - CA 19

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
2020-04-01	480-640	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2020-04-01	608-672	1XXX2XXX · 2 holders which blocks →	MCC TELEPHONY OF THE MIDWEST, LLC - WI	983F	CHASEBURG	WI
2020-04-01	608-679	1XXX2XXX4XXX · 3 holders which blocks →	MCC TELEPHONY OF THE MIDWEST, LLC - WI	983F	STODDARD	WI
2020-04-01	772-477	0XXX1XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	FRACTEL, LLC	965H	INDIANTOWN	FL
2020-04-01	845-799	0–9 XXXall 10 · 6 holders which blocks →	XCHANGE TELECOM CORP. - NY	325B	MONROE	NY
2020-04-01	941-344	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	MYAKKA	FL
2020-04-01	941-732	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	NORTH PORT	FL
2020-04-01	971-369	0–9 XXXall 10 · 6 holders which blocks →	PAETEC ITEL, LLC	829J	PORTLAND	OR
2020-04-01	984-254	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	RAL DUR AP	NC
2020-03-31	202-948	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSHNGTNZN1	DC
2020-03-31	202-960	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - DC	6117	WSHNGTNZN1	DC
2020-03-31	205-961	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL	6804	BIRMINGHAM	AL
2020-03-31	205-962	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL	6804	BIRMINGHAM	AL
2020-03-31	205-963	0–9 XXXall 10 · 4 holders which blocks →	INTRADO COMMUNICATIONS LLC	807C	BIRMINGHAM	AL
2020-03-31	251-319	0–9 XXXall 10 · 3 holders which blocks →	INTRADO COMMUNICATIONS LLC	807C	MOBILE	AL
2020-03-31	254-373	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	WACO	TX
2020-03-31	314-904	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MO	093F	ST LOUIS	MO
2020-03-31	320-435	0XXX1XXX3XXX4XXX6XXX7XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN	5816	MONTEVIDEO	MN
2020-03-31	332-228	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	NWYRCYZN01	NY
2020-03-31	332-229	0–9 XXXwhole prefix which blocks →	RCN TELECOM SERVICES, INC. - NY	7353	NWYRCYZN01	NY
2020-03-31	401-296	0–9 XXXall 10 · 6 holders which blocks →	INTRADO COMMUNICATIONS, LLC	836C	PROVIDENCE	RI
2020-03-31	470-670	0–9 XXXall 10 · 4 holders which blocks →	HD CARRIER LLC	321J	ATLANTA	GA
2020-03-31	501-403	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	BENTON	AR
2020-03-31	501-409	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	BENTON	AR
2020-03-31	513-663	0–9 XXXall 10 · 4 holders which blocks →	HD CARRIER LLC	321J	HAMILTON	OH
2020-03-31	571-462	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	OCCOQUAN	VA
2020-03-31	639-703	not yet reported which blocks →	SaskTel Mobility	9868	Waskesiu Lake	—
2020-03-31	720-704	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	DENVER	CO
2020-03-31	725-232	0–9 XXXall 10 · 2 holders which blocks →	HD CARRIER LLC	321J	LAS VEGAS	NV
2020-03-31	872-278	0–9 XXXwhole prefix which blocks →	ONVOY, LLC	224C	CHICGOZN01	IL
2020-03-31	873-455	not yet reported which blocks →	Bell Mobility	6574	Ottawa-Hull	—
2020-03-31	901-506	0–9 XXXall 10 · 3 holders which blocks →	INTRADO COMMUNICATIONS, LLC	845C	MEMPHIS	TN
2020-03-31	989-320	0–9 XXXall 10 · 4 holders which blocks →	INTRADO COMMUNICATIONS, LLC	821C	SAGINAW	MI
2020-03-30	202-946	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	WSHNGTNZN1	DC
2020-03-30	213-472	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MONTEBELLO	CA
2020-03-30	437-625	not yet reported which blocks →	Bell Mobility	6574	Toronto	—
2020-03-30	438-472	not yet reported which blocks →	Bell Mobility	6574	Montreal	—
2020-03-30	470-580	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA	GA
2020-03-30	470-597	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA	GA
2020-03-30	639-702	not yet reported which blocks →	SaskTel Mobility	9868	Dillon	—
2020-03-30	657-428	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	ORANGE	CA
2020-03-30	689-220	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	ORLANDO	FL
2020-03-30	725-231	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NV	075F	LAS VEGAS	NV
2020-03-30	726-268	0–9 XXXall 10 · 5 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	SANANTONIO	TX
2020-03-30	731-289	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TN	124F	MEDINA	TN
2020-03-30	913-382	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BONNER SPG	KS
2020-03-30	947-217	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	SOUTHFIELD	MI
2020-03-30	947-218	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	TROY	MI
2020-03-27	209-424	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	MODESTO	CA
2020-03-27	213-376	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	LSAN DA 11	CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.