Recent prefix assignments

2 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 — NPA 636

ONVOY, LLC - MO 2

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
2020-12-22	636-837	0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 3 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	HERCUMPVLY	MO
2020-09-29	636-210	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	UNION	MO
2020-09-21	636-245	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MAXVILLE	MO
2020-09-01	636-348	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	FRACTEL, LLC	965H	ST PETERS	MO
2020-08-25	636-339	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	T-MOBILE USA, INC.	6529	OFALLON	MO
2020-08-17	636-201	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WARRENTON	MO
2020-07-27	636-335	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO	7432	FENTON	MO
2020-05-14	636-319	0–9 XXXall 10 · 6 holders which blocks →	BRIGHTSPEED OF MISSOURI, LLC	9787	DARDENNE	MO
2019-10-25	636-758	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	ST CLAIR	MO
2019-10-24	636-732	0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	FRACTEL, LLC	965H	GRAYSUMMIT	MO
2019-09-03	636-637	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO	7432	FSSCRSTLCY	MO
2019-03-06	636-330	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	PEERLESS NETWORK OF MISSOURI, LLC - MO	225F	DE SOTO	MO
2019-02-06	636-829	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	T-MOBILE USA, INC.	6529	HIGH RIDGE	MO
2018-12-24	636-666	0–9 XXXall 10 · 2 holders which blocks →	TERRA NOVA TELECOM INC.	145J	UNION	MO
2018-09-18	636-202	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO	7432	WARRENTON	MO
2018-04-26	636-292	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MO	7218	CHESTERFLD	MO
2017-08-09	636-331	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	FSSCRSTLCY	MO
2017-04-06	636-849	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	T-MOBILE USA, INC.	6529	OFALLON	MO
2017-03-24	636-865	0XXX5XXX6XXX · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MO	6123	HILLSBORO	MO
2017-03-23	636-303	0–9 XXXall 10 · 5 holders which blocks →	TELNYX LLC	073H	UNION	MO
2016-04-05	636-310	0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	HILLSBORO	MO
2016-02-18	636-317	0–9 XXXall 10 · 6 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	HARVESTER	MO
2016-01-07	636-215	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO	5814	MAXVILLE	MO
2016-01-05	636-409	0–9 XXXall 10 · 5 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	OFALLON	MO
2016-01-05	636-747	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MO	093F	PACIFIC	MO
2015-11-06	636-312	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	OFALLON	MO
2015-10-14	636-800	0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MO	093F	ST CHARLES	MO
2015-10-14	636-900	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MO	093F	WASHINGTON	MO
2015-06-16	636-428	0–9 XXXall 10 · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MO	7218	HIGH RIDGE	MO
2015-03-20	636-999	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MO	093F	PACIFIC	MO
2015-02-11	636-275	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO	5814	MAXVILLE	MO
2014-11-10	636-535	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO	5814	FSSCRSTLCY	MO
2014-07-03	636-249	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	UNION	MO
2014-07-03	636-306	0–9 XXXall 10 · 6 holders which blocks →	METROPCS, INC.	5562	HERCUMPVLY	MO
2014-07-03	636-383	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	TROY	MO
2014-03-28	636-206	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	ST CHARLES	MO
2014-03-17	636-551	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO	5814	CEDAR HILL	MO
2014-01-27	636-515	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	OFALLON	MO
2014-01-21	636-888	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF MISSOURI, LLC - MO	225F	ST CLAIR	MO
2013-09-20	636-706	0–9 XXXall 10 · 6 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	ST PETERS	MO
2013-08-19	636-495	0–9 XXXall 10 · 7 holders which blocks →	PAETEC ITEL, LLC	829J	HIGH RIDGE	MO
2013-04-18	636-362	0–9 XXXall 10 · 7 holders which blocks →	SOUTHWESTERN BELL	9533	HARVESTER	MO
2013-02-01	636-429	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF MISSOURI, LLC - MO	225F	EUREKA	MO
2012-11-13	636-445	0–9 XXXall 10 · 7 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	WENTZVILLE	MO
2012-05-22	636-638	0–9 XXXall 10 · 7 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	FSSCRSTLCY	MO
2011-10-27	636-649	0–9 XXXall 10 · 7 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	UNION	MO
2011-04-18	636-725	0–9 XXXall 10 · 4 holders which blocks →	PAETEC ITEL, LLC	829J	FSSCRSTLCY	MO
2011-02-25	636-385	0–9 XXXall 10 · 6 holders which blocks →	BRIGHTSPEED OF MISSOURI, LLC	9787	OFALLON	MO
2011-02-07	636-775	0–9 XXXall 10 · 5 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	TROY	MO
2011-01-14	636-439	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	OFALLON	MO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.