Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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. 38

ONVOY, LLC - CA 31

NEW CINGULAR WIRELESS PCS, LLC - IL 28

NEW CINGULAR WIRELESS PCS, LLC - DC 26

ONVOY, LLC - NJ 18

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 — who really holds the numbers	Code holder	OCN	Rate center	State
—	918-344	Not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	TULSA	OK
—	918-346	10 of 10 blocks assigned · 2 holders which blocks →	COMCAST IP PHONE, LLC	318J	TULSA	OK
—	918-347	9 of 10 blocks assigned · 6 holders which blocks →	PAETEC ITEL, LLC	829J	SAPULPA	OK
—	918-349	0 of 10 blocks assigned · 0 holders which blocks →	TOTAH COMMUNICATIONS, INC.	2030	SOUTHELGIN	OK
—	918-350	10 of 10 blocks assigned · 4 holders which blocks →	T-MOBILE USA, INC.	6529	BARTLESVL	OK
—	918-351	9 of 10 blocks assigned · 4 holders which blocks →	METROPCS, INC.	5562	MUSKOGEE	OK
—	918-352	3 of 10 blocks assigned · 2 holders which blocks →	SOUTHWESTERN BELL	9533	DRUMRIGHT	OK
—	918-353	3 of 10 blocks assigned · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK	5813	JAY	OK
—	918-354	Not yet reported which blocks →	CIMARRON TEL. CO.	1982	OSAGE	OK
—	918-355	Not yet reported which blocks →	VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW	1165	BROKENARRW	OK
—	918-356	Not yet reported which blocks →	CIMARRON TEL. CO.	1982	HALLETT	OK
—	918-357	Not yet reported which blocks →	VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW	1165	BROKENARRW	OK
—	918-358	5 of 10 blocks assigned · 3 holders which blocks →	SOUTHWESTERN BELL	9533	CLEVELAND	OK
—	918-359	Not yet reported which blocks →	ONVOY, LLC - OK	409F	TULSA	OK
—	918-360	0 of 10 blocks assigned · 0 holders which blocks →	T-MOBILE USA, INC.	6529	MUSKOGEE	OK
—	918-361	2 of 10 blocks assigned · 2 holders which blocks →	T-MOBILE USA, INC.	6529	TULSA	OK
—	918-362	0 of 10 blocks assigned · 0 holders which blocks →	ONVOY, LLC - OK	409F	BROKENARRW	OK
—	918-363	Not yet reported which blocks →	CIMARRON TEL. CO.	1982	MANNFORD E	OK
—	918-364	Not yet reported which blocks →	BIXBY TEL. CO., INC.	1969	BIXBY	OK
—	918-365	Not yet reported which blocks →	BIXBY TEL. CO., INC.	1969	BIXBY	OK
—	918-366	Not yet reported which blocks →	BIXBY TEL. CO., INC.	1969	BIXBY	OK
—	918-367	3 of 10 blocks assigned · 2 holders which blocks →	SOUTHWESTERN BELL	9533	BRISTOW	OK
—	918-368	Not yet reported which blocks →	CENTRAL OKLAHOMA TELEPHONE CO., L.L.C.	1977	KENDRICK	OK
—	918-369	Not yet reported which blocks →	BIXBY TEL. CO., INC.	1969	BIXBY	OK
—	918-371	Not yet reported which blocks →	SOUTHWESTERN BELL	9533	COLLINSVL	OK
—	918-372	8 of 10 blocks assigned · 4 holders which blocks →	SOUTHWESTERN BELL	9533	RIPLEY	OK
—	918-373	4 of 10 blocks assigned · 4 holders which blocks →	UNITED STATES CELLULAR - OK	6272	PRYOR	OK
—	918-374	Not yet reported which blocks →	CENTRAL OKLAHOMA TELEPHONE CO., L.L.C.	1977	TRYON	OK
—	918-375	0 of 10 blocks assigned · 0 holders which blocks →	CENTRAL OKLAHOMA TELEPHONE CO., L.L.C.	1977	AGRA	OK
—	918-376	6 of 10 blocks assigned · 4 holders which blocks →	SOUTHWESTERN BELL	9533	OWASSO	OK
—	918-377	Not yet reported which blocks →	CENTRAL OKLAHOMA TELEPHONE CO., L.L.C.	1977	DAVENPORT	OK
—	918-379	6 of 10 blocks assigned · 4 holders which blocks →	SOUTHWESTERN BELL	9533	CATOOSA	OK
—	918-381	0 of 10 blocks assigned · 0 holders which blocks →	UNITED STATES CELLULAR - OK	6272	TULSA	OK
—	918-382	1 of 10 blocks assigned · 1 holder which blocks →	SOUTHWESTERN BELL	9533	TULSA	OK
—	918-383	8 of 10 blocks assigned · 5 holders which blocks →	SOUTHWESTERN BELL	9533	NEW HOME	OK
—	918-384	2 of 10 blocks assigned · 1 holder which blocks →	SOUTHWESTERN BELL	9533	TULSA	OK
—	918-386	0 of 10 blocks assigned · 0 holders which blocks →	CONSOLIDATED COMMUNICATIONS OF OKLAHOMA COMPANY	1981	CEDARCREST	OK
—	918-387	6 of 10 blocks assigned · 4 holders which blocks →	SOUTHWESTERN BELL	9533	YALE	OK
—	918-388	4 of 10 blocks assigned · 2 holders which blocks →	PAETEC ITEL, LLC	829J	TULSA	OK
—	918-389	Not yet reported which blocks →	CHEROKEE TEL. CO.	1979	ARPELAR	OK
—	918-390	3 of 10 blocks assigned · 3 holders which blocks →	NORTHEAST RURAL SERVICES, INC. - OK	945H	SALINA	OK
—	918-391	3 of 10 blocks assigned · 1 holder which blocks →	CROSS WIRELESS, L.L.C.	148G	MUSKOGEE	OK
—	918-392	Whole prefix — all 10 blocks, 1 holder which blocks →	COMCAST IP PHONE, LLC	318J	TULSA	OK
—	918-393	9 of 10 blocks assigned · 3 holders which blocks →	ONVOY, LLC - OK	409F	MULDROW	OK
—	918-394	1 of 10 blocks assigned · 1 holder which blocks →	COMCAST IP PHONE, LLC	318J	BIXBY	OK
—	918-395	9 of 10 blocks assigned · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	YALE	OK
—	918-396	1 of 10 blocks assigned · 1 holder which blocks →	SOUTHWESTERN BELL	9533	SKIATOOK	OK
—	918-397	3 of 10 blocks assigned · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BARTLESVL	OK
—	918-398	8 of 10 blocks assigned · 4 holders which blocks →	ONVOY, LLC - OK	409F	TULSA	OK
—	918-406	1 of 10 blocks assigned · 1 holder which blocks →	T-MOBILE USA, INC.	6529	TULSA	OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.