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
2020-02-28	657-423	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SILVERADO	CA
2020-02-28	657-450	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SANTA ANA	CA
2020-02-28	657-471	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	WESTMINSTR	CA
2020-02-28	681-330	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	METROPCS, INC.	5562	GRAFTON	WV
2020-02-28	737-787	0–9 XXXall 10 · 3 holders which blocks →	HD CARRIER LLC	321J	AUSTIN	TX
2020-02-28	786-751	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	KEYS	FL
2020-02-28	951-519	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	TEMSCL CNY	CA
2020-02-27	236-500	not yet reported which blocks →	Iristel Inc.	154E	Penticton	—
2020-02-27	409-254	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	WOODVILLE	TX
2020-02-27	709-309	not yet reported which blocks →	Iristel Inc.	154E	Marystown	—
2020-02-27	786-750	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	MIAMI	FL
2020-02-27	867-280	not yet reported which blocks →	Bell Mobility	6574	Yellowknife	—
2020-02-27	931-340	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TN	4806	CROSSVILLE	TN
2020-02-26	236-646	not yet reported which blocks →	Iristel Inc.	154E	North Vancouver	—
2020-02-26	343-453	not yet reported which blocks →	Iristel Inc.	154E	Belleville	—
2020-02-26	346-423	0–9 XXXall 10 · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	PORTER	TX
2020-02-26	365-364	not yet reported which blocks →	Iristel Inc.	154E	Welland	—
2020-02-26	405-860	0XXX1XXX3XXX4XXX5XXX6XXX · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - OK	119F	PADEN	OK
2020-02-26	864-566	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC	8534	GREENVILLE	SC
2020-02-25	334-579	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	DOTHAN	AL
2020-02-25	480-613	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	PHOENIX	AZ
2020-02-25	513-540	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - OH	464C	MIDDLETOWN	OH
2020-02-25	608-808	0XXX1XXX8XXX · 2 holders which blocks →	MCC TELEPHONY OF THE MIDWEST, LLC - WI	983F	BELMONT	WI
2020-02-25	774-427	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	METROPCS, INC.	5562	FRAMINGHAM	MA
2020-02-25	848-287	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	TOMS RIVER	NJ
2020-02-25	929-541	0–9 XXXwhole prefix which blocks →	CSC WIRELESS, LLC	425J	NWYRCYZN03	NY
2020-02-25	989-899	0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	FRACTEL, LLC	965H	SAGINAW	MI
2020-02-24	226-576	not yet reported which blocks →	IXICA Communications Inc.	812H	Rockwood	—
2020-02-24	234-324	0XXX1XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks →	ONVOY, LLC - OH	464C	BEACH CITY	OH
2020-02-24	262-655	5XXX which blocks →	FRACTEL, LLC	965H	BERGEN	WI
2020-02-24	309-903	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC	224C	ROCKISLAND	IL
2020-02-24	352-663	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	GAINESVL	FL
2020-02-24	431-341	not yet reported which blocks →	Iristel Inc.	154E	Starbuck	—
2020-02-24	506-404	not yet reported which blocks →	Iristel Inc.	154E	Richibucto	—
2020-02-24	567-667	0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY SPECTRUM, LLC	624H	EDON	OH
2020-02-24	567-677	0XXX1XXX2XXX6XXX7XXX8XXX · 3 holders which blocks →	ONVOY, LLC - OH	464C	VAN BUREN	OH
2020-02-24	639-309	not yet reported which blocks →	Iristel Inc.	154E	Lanigan	—
2020-02-24	639-636	not yet reported which blocks →	Iristel Inc.	154E	Rouleau	—
2020-02-24	709-509	not yet reported which blocks →	Iristel Inc.	154E	Carbonear	—
2020-02-24	743-206	0XXX2XXX3XXX4XXX · 2 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	REEDS	NC
2020-02-24	825-305	not yet reported which blocks →	Iristel Inc.	154E	Calgary	—
2020-02-24	825-425	not yet reported which blocks →	Iristel Inc.	154E	Calgary	—
2020-02-24	854-336	4XXX6XXX8XXX · 3 holders which blocks →	FRACTEL, LLC	965H	JAMESTOWN	SC
2020-02-24	854-356	7XXX9XXX which blocks →	FRACTEL, LLC	965H	MACEDONIA	SC
2020-02-24	854-842	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	RIDGELAND	SC
2020-02-24	854-977	0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks →	FRACTEL, LLC	965H	WILLIAMS	SC
2020-02-24	864-588	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	FRACTEL, LLC	965H	JOANNA	SC
2020-02-21	210-809	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	SANANTONIO	TX
2020-02-21	229-298	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	VALDOSTA	GA
2020-02-21	234-269	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	HUDSON	OH

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.