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
—	405-210	none assigned yet which blocks →	T-MOBILE USA, INC.	6529	OKLA CITY	OK
—	405-211	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	OK
—	405-212	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	OKLA CITY	OK
—	405-214	2XXX9XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	SHAWNEE	OK
—	405-215	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	OKLA CITY	OK
—	405-216	1XXX3XXX4XXX5XXX6XXX · 3 holders which blocks →	SOUTHWESTERN BELL	9533	EDMOND	OK
—	405-217	0XXX3XXX4XXX5XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	NORMAN	OK
—	405-218	not yet reported which blocks →	SOUTHWESTERN BELL	9533	OKLA CITY	OK
—	405-219	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	SOUTHWESTERN BELL	9533	OKLA CITY	OK
—	405-220	0–9 XXXall 10 · 5 holders which blocks →	UNITED STATES CELLULAR - OK	6272	SEMINOLE	OK
—	405-221	8XXX9XXX which blocks →	UNITED STATES CELLULAR - OK	6272	HOLDENVL	OK
—	405-222	none assigned yet which blocks →	SOUTHWESTERN BELL	9533	CHICKASHA	OK
—	405-224	not yet reported which blocks →	SOUTHWESTERN BELL	9533	CHICKASHA	OK
—	405-227	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	OKLA CITY	OK
—	405-228	not yet reported which blocks →	SOUTHWESTERN BELL	9533	OKLA CITY	OK
—	405-230	0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks →	SOUTHWESTERN BELL	9533	OKLA CITY	OK
—	405-231	not yet reported which blocks →	SOUTHWESTERN BELL	9533	OKLA CITY	OK
—	405-232	not yet reported which blocks →	SOUTHWESTERN BELL	9533	OKLA CITY	OK
—	405-233	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	PAETEC ITEL, LLC	829J	ARCADIA	OK
—	405-234	0XXX1XXX6XXX7XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	OKLA CITY	OK
—	405-235	not yet reported which blocks →	SOUTHWESTERN BELL	9533	OKLA CITY	OK
—	405-236	not yet reported which blocks →	SOUTHWESTERN BELL	9533	OKLA CITY	OK
—	405-237	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	SOUTHWESTERN BELL	9533	MOORE	OK
—	405-238	none assigned yet which blocks →	SOUTHWESTERN BELL	9533	PAULS VLY	OK
—	405-239	0XXX4XXX8XXX9XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	OKLA CITY	OK
—	405-240	2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	SOUTHWESTERN BELL	9533	CHANDLER	OK
—	405-241	1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA OK - LLC	530C	BRITTON	OK
—	405-243	0–9 XXXall 10 · 2 holders which blocks →	UNITED STATES CELLULAR - OK	6272	OKLA CITY	OK
—	405-245	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK	5813	OKLA CITY	OK
—	405-246	0XXX4XXX5XXX6XXX8XXX · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA OK - LLC	530C	OKLA CITY	OK
—	405-247	0XXX which blocks →	SOUTHWESTERN BELL	9533	ANADARKO	OK
—	405-248	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA OK - LLC	530C	OKLA CITY	OK
—	405-250	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	OKLA CITY	OK
—	405-251	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	UNITED STATES CELLULAR - OK	6272	WYNNEWOOD	OK
—	405-253	0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA OK - LLC	530C	NORMAN	OK
—	405-254	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK	7258	BRITTON	OK
—	405-256	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	MUSTANG	OK
—	405-257	0XXX4XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	WEWOKA	OK
—	405-258	none assigned yet which blocks →	SOUTHWESTERN BELL	9533	CHANDLER	OK
—	405-259	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	COMCAST IP PHONE, LLC	318J	NICOMAPARK	OK
—	405-260	2XXX5XXX8XXX9XXX · 3 holders which blocks →	SOUTHWESTERN BELL	9533	GUTHRIE	OK
—	405-261	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	COMCAST IP PHONE, LLC	318J	WHEATLAND	OK
—	405-262	not yet reported which blocks →	SOUTHWESTERN BELL	9533	EL RENO	OK
—	405-263	not yet reported which blocks →	PIONEER TEL. COOP., INC.	2018	OKARCHE	OK
—	405-264	3XXX6XXX7XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	OKLA CITY	OK
—	405-265	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	YUKON	OK
—	405-266	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - OK	409F	WANETTE	OK
—	405-267	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - OK	119F	BYARS	OK
—	405-268	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	PAULS VLY	OK
—	405-269	0XXX5XXX7XXX which blocks →	T-MOBILE USA, INC.	6529	STILLWATER	OK

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.