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
2005-06-06	601-793	3XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MS	5178	DE KALB	MS
2005-06-06	601-806	3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MS	5178	MONTICELLO	MS
2005-06-06	601-841	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MS	5178	GLOSTER	MS
2005-06-06	601-890	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MS	5178	CENTREVL	MS
2005-06-06	601-904	3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MS	5178	ROXIE	MS
2005-06-06	601-980	1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MS	5178	LIBERTY	MS
2005-06-06	651-399	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TWINCITIES	MN
2005-06-06	803-818	0–9 XXXall 10 · 6 holders which blocks →	PBT COMMUNICATIONS, INC. - SC	3453	YORK	SC
2005-06-06	806-822	not yet reported which blocks →	AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX	0132	CLARENDON	TX
2005-06-06	814-519	0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - PA	547E	GALETON	PA
2005-06-06	903-613	not yet reported which blocks →	ETEX COMMUNCATIONS, LLC DBA ETEX TELECOM - TX	3196	HAWKINS	TX
2005-06-04	303-862	0–9 XXXall 10 · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	DENVER	CO
2005-06-03	209-568	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	MODESTO	CA
2005-06-03	450-420	not yet reported which blocks →	Bell Canada	8050	Ste-Therese	—
2005-06-03	559-853	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	PORTERVL	CA
2005-06-03	618-881	0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks →	MCC TELEPHONY LLC	593K	ALTAMONT	IL
2005-06-03	618-892	0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	MCC TELEPHONY LLC	593K	FARINA	IL
2005-06-03	661-302	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	BKFD MAIN	CA
2005-06-03	707-981	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	PTLM MAIN	CA
2005-06-03	760-904	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	PALM SPG	CA
2005-06-03	785-953	0–9 XXXall 10 · 8 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS	6532	OAKLEY	KS
2005-06-03	831-920	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	MONTEREY	CA
2005-06-03	951-579	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	ELSINORE	CA
2005-06-02	202-701	0–9 XXXall 10 · 3 holders which blocks →	VERIZON WASHINGTON DC, INC.	9211	WSHNGTNZN1	DC
2005-06-02	248-313	0–9 XXXall 10 · 8 holders which blocks →	PAETEC ITEL, LLC	829J	WALLEDLAKE	MI
2005-06-02	269-455	0–9 XXXall 10 · 8 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	SAUGATUCK	MI
2005-06-02	615-785	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN	6673	MURFREESBO	TN
2005-06-02	903-603	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MABANK	TX
2005-06-02	928-550	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	SOMERTON	AZ
2005-06-02	951-816	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	MURRIETA	CA
2005-06-01	303-396	0–9 XXXall 10 · 5 holders which blocks →	LIVE WIRE NETWORKS, INC. - CO	3044	DENVER	CO
2005-06-01	406-471	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	KALISPELL	MT
2005-06-01	408-786	0–9 XXXall 10 · 5 holders which blocks →	XO CALIFORNIA, INC.	7262	SNJS NORTH	CA
2005-06-01	530-923	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	MARYSVILLE	CA
2005-06-01	670-237	not yet reported which blocks →	MICRONESIAN TELECOMMUNICATIONS CORPORATION	3700	SAIPAN	—
2005-06-01	712-584	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SPENCER	IA
2005-06-01	740-792	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	STEUBENVL	OH
2005-06-01	757-385	0–9 XXXwhole prefix which blocks →	VERIZON SOUTH, INC. - VA (CONTEL)	0233	NRFOLKZON4	VA
2005-06-01	757-389	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	NRFOLKZON1	VA
2005-05-31	248-773	0–9 XXXall 10 · 7 holders which blocks →	PAETEC ITEL, LLC	829J	NORTHVILLE	MI
2005-05-31	270-425	0–9 XXXall 10 · 7 holders which blocks →	POWERTEL KENTUCKY LICENSES, INC.	365C	DAWSON SPG	KY
2005-05-31	309-885	0–9 XXXall 10 · 8 holders which blocks →	BRIGHTSPEED OF ILLINOIS, LLC	1057	PEKIN	IL
2005-05-31	404-552	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	ATLANTA	GA
2005-05-31	414-269	0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	MILWAUKZN1	WI
2005-05-31	480-254	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2005-05-31	573-303	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO	7432	COLUMBIA	MO
2005-05-31	575-973	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM	6573	RUIDOSO	NM
2005-05-31	614-915	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	COLUMBUS	OH
2005-05-31	618-510	0XXX9XXX · 2 holders which blocks →	MCC TELEPHONY LLC	593K	ST ELMO	IL
2005-05-31	757-609	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - VA	8825	NRFOLKZON1	VA

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.