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
2016-10-26	763-347	0–9 XXXall 10 · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MN	8405	TWINCITIES	MN
2016-10-26	763-361	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MN	8405	TWINCITIES	MN
2016-10-26	813-955	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	TAMPACEN	FL
2016-10-25	248-940	0–9 XXXall 10 · 7 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIRMINGHAM	MI
2016-10-25	270-455	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	HEBBARDSVL	KY
2016-10-25	314-462	0–9 XXXall 10 · 4 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	KIRKWOOD	MO
2016-10-25	539-206	2XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OK	5257	LOCUST GRV	OK
2016-10-25	539-219	2XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OK	5257	STRANG	OK
2016-10-25	717-251	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	CHAMBERSBG	PA
2016-10-25	857-424	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ROXBURY	MA
2016-10-24	272-762	0–9 XXXwhole prefix which blocks →	VERIZON PENNSYLVANIA, INC.	9208	STROUDSBG	PA
2016-10-24	469-782	0–9 XXXall 10 · 4 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	PLANO	TX
2016-10-24	480-490	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2016-10-24	480-793	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2016-10-24	579-200	not yet reported which blocks →	TELUS Quebec	2243	Lachute	—
2016-10-24	579-201	not yet reported which blocks →	TELUS Quebec	2243	St-Sauveur	—
2016-10-24	579-202	not yet reported which blocks →	TELUS Quebec	2243	Ste-Adele	—
2016-10-24	579-203	not yet reported which blocks →	TELUS Quebec	2243	Brownsburg	—
2016-10-24	601-967	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	BROOKHAVEN	MS
2016-10-24	619-558	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	EL CAJON	CA
2016-10-24	769-238	0XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	EAGLE LAKE	MS
2016-10-24	775-571	0–9 XXXwhole prefix which blocks →	PEERLESS NETWORK OF NEVADA, LLC - NV	408F	PAHRUMP	NV
2016-10-24	850-901	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - FL	8300	TALLAHASSE	FL
2016-10-24	859-216	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	NOMIDDLETN	KY
2016-10-24	916-713	0–9 XXXall 10 · 7 holders which blocks →	T-MOBILE USA, INC.	6529	SCRM NORTH	CA
2016-10-21	438-504	not yet reported which blocks →	Videotron Ltd.	328F	Montreal	—
2016-10-21	480-869	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2016-10-21	510-822	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	OKLD TRNID	CA
2016-10-21	623-233	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2016-10-20	240-918	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ASHTON236	MD
2016-10-20	312-764	0–9 XXXall 10 · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - IL	7136	CHICGOZN01	IL
2016-10-20	337-518	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 7 holders which blocks →	DETEL WIRELESS, LLC - LA	650C	VL PLATTE	LA
2016-10-20	469-868	0–9 XXXall 10 · 5 holders which blocks →	AIRUS, INC. - TX	951F	DALLAS	TX
2016-10-20	603-803	0–9 XXXall 10 · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	KEENE	NH
2016-10-20	813-557	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	TAMPACEN	FL
2016-10-19	225-998	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - LA	749E	DENHAM SPG	LA
2016-10-19	234-423	0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	WILMOT	OH
2016-10-19	249-290	not yet reported which blocks →	Nexicom Telecommunications Inc	995D	Bobcaygeon	—
2016-10-19	249-291	not yet reported which blocks →	Nexicom Telecommunications Inc	995D	Fenelon Falls	—
2016-10-19	346-874	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7074	SUGAR LAND	TX
2016-10-19	346-998	0–9 XXXwhole prefix which blocks →	PEERLESS NETWORK OF TEXAS, LLC - TX	177F	HOUSTON	TX
2016-10-19	470-522	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA	GA
2016-10-19	470-538	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA NE	GA
2016-10-19	581-572	not yet reported which blocks →	TELUS Mobility	8303	Tadoussac	—
2016-10-19	623-232	0–9 XXXall 10 · 4 holders which blocks →	QWEST CORPORATION	9636	PHOENIX	AZ
2016-10-19	740-840	0XXX1XXX2XXX3XXX8XXX9XXX · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	MURRAYCITY	OH
2016-10-19	757-902	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	NWPTNWSZN2	VA
2016-10-19	782-360	not yet reported which blocks →	TELUS Integrated Communications	2782	Montague	—
2016-10-19	939-355	0–9 XXXall 10 · 5 holders which blocks →	LIBERTY COMMUNICATIONS OF PUERTO RICO LLC	955G	BAYAMONNOR	PR
2016-10-19	939-715	0–9 XXXall 10 · 3 holders which blocks →	LIBERTY COMMUNICATIONS OF PUERTO RICO LLC	955G	CAGUAS	PR

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.