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
—	405-987	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	NICOMAPARK	OK
—	405-990	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	OKLA CITY	OK
—	405-996	0XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK	7258	OKLA CITY	OK
—	405-997	not yet reported which blocks →	POTTAWATOMIE TEL. CO.	2020	EARLSBORO	OK
—	405-999	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK	5813	CHICKASHA	OK
—	406-203	2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	MISSOULA	MT
—	406-204	1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	HELENA	MT
—	406-205	9XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	GREATFALLS	MT
—	406-206	not yet reported which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	BILLINGS	MT
—	406-210	6XXX7XXX8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	SEELEYLAKE	MT
—	406-211	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MT
—	406-214	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	MISSOULA	MT
—	406-215	0–9 XXXall 10 · 5 holders which blocks →	SKYE TELECOM LLC DBA SKYETEL	622J	MISSOULA	MT
—	406-216	0XXX6XXX7XXX · 3 holders which blocks →	3 RIVERS TELEPHONE COOPERATIVE, INC. - MT	3924	GREATFALLS	MT
—	406-217	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	GREATFALLS	MT
—	406-220	5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	LIVINGSTON	MT
—	406-222	not yet reported which blocks →	QWEST CORPORATION	9636	LIVINGSTON	MT
—	406-223	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	LIVINGSTON	MT
—	406-224	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	LIVINGSTON	MT
—	406-225	0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	QWEST CORPORATION	9636	BOULDER	MT
—	406-226	0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 4 holders which blocks →	QWEST CORPORATION	9636	EGLACIERPK	MT
—	406-227	not yet reported which blocks →	QWEST CORPORATION	9636	HELENA	MT
—	406-228	5XXX which blocks →	NEMONT TEL COOP INC	2247	GLASGOW	MT
—	406-230	4XXX6XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	GLASGOW	MT
—	406-232	not yet reported which blocks →	QWEST CORPORATION	9636	MILES CITY	MT
—	406-233	0XXX1XXX6XXX8XXX9XXX · 3 holders which blocks →	QWEST CORPORATION	9636	MILES CITY	MT
—	406-234	not yet reported which blocks →	MID-RIVERS TELEPHONE COOPERATIVE, INC.	7830	MILES CITY	MT
—	406-235	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	QWEST CORPORATION	9636	WOLF CREEK	MT
—	406-236	not yet reported which blocks →	3 RIVERS TEL. COOP., INC.	2255	NEIHART	MT
—	406-237	not yet reported which blocks →	QWEST CORPORATION	9636	BILLINGS	MT
—	406-238	not yet reported which blocks →	QWEST CORPORATION	9636	BILLINGS	MT
—	406-239	none assigned yet which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MISSOULA	MT
—	406-240	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MISSOULA	MT
—	406-241	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MISSOULA	MT
—	406-243	not yet reported which blocks →	QWEST CORPORATION	9636	MISSOULA	MT
—	406-244	not yet reported which blocks →	BLACKFOOT TEL. COOP., INC.	2235	POTOMAC	MT
—	406-245	not yet reported which blocks →	QWEST CORPORATION	9636	BILLINGS	MT
—	406-246	not yet reported which blocks →	BLACKFOOT TEL. COOP., INC.	2235	DIXON	MT
—	406-247	0XXX9XXX · 2 holders which blocks →	QWEST CORPORATION	9636	BILLINGS	MT
—	406-248	0XXX which blocks →	QWEST CORPORATION	9636	BILLINGS	MT
—	406-249	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	KALISPELL	MT
—	406-250	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	KALISPELL	MT
—	406-251	not yet reported which blocks →	QWEST CORPORATION	9636	MISSOULA	MT
—	406-252	not yet reported which blocks →	QWEST CORPORATION	9636	BILLINGS	MT
—	406-253	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	KALISPELL	MT
—	406-254	not yet reported which blocks →	QWEST CORPORATION	9636	BILLINGS	MT
—	406-255	not yet reported which blocks →	QWEST CORPORATION	9636	BILLINGS	MT
—	406-256	not yet reported which blocks →	QWEST CORPORATION	9636	BILLINGS	MT
—	406-257	not yet reported which blocks →	CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK	2249	KALISPELL	MT
—	406-258	0XXX1XXX7XXX8XXX · 3 holders which blocks →	QWEST CORPORATION	9636	MISSOULA	MT

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.