NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

26 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 636
ONVOY, LLC - MO 24
EXIANT COMMUNICATIONS LLC 1
BANDWIDTH.COM CLEC, LLC - MO 1
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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2011-08-22 636-402-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E GRAYSUMMIT MO
2011-08-22 636-431-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E VALLEYPARK MO
2011-08-22 636-481-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E HILLSBORO MO
2011-08-22 636-549-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E EUREKA MO
2011-08-22 636-590-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E CHESTERFLD MO
2011-08-22 636-725-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E FSSCRSTLCY MO
2011-08-22 636-748-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E CEDAR HILL MO
2011-08-22 636-944-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E WARE MO
2011-08-03 636-200-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 MANCHESTER MO
2011-08-03 636-345-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HARVESTER MO
2011-08-01 636-486-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E HARVESTER MO
2011-08-01 636-498-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E HARVESTER MO
2011-07-22 636-543-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FSSCRSTLCY MO
2011-07-20 636-486-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 HARVESTER MO
2011-07-06 636-439-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OFALLON MO
2011-07-06 636-728-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHESTERFLD MO
2011-06-17 636-279-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST PETERS MO
2011-06-03 636-373-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST CHARLES MO
2011-05-31 636-435-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 VALLEYPARK MO
2011-05-31 636-435-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 VALLEYPARK MO
2011-05-31 636-486-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E HARVESTER MO
2011-05-31 636-486-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E HARVESTER MO
2011-05-27 636-493-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ST CHARLES MO
2011-05-27 636-778-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CHESTERFLD MO
2011-05-24 636-385-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OFALLON MO
2011-05-17 636-543-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FSSCRSTLCY MO
2011-05-09 636-692-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 HIGH RIDGE MO
2011-05-02 636-851-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E HARVESTER MO
2011-04-28 636-285-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C CEDAR HILL MO
2011-04-28 636-334-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PACIFIC MO
2011-04-28 636-434-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PORTAGSIUX MO
2011-04-21 636-243-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DE SOTO MO
2011-04-21 636-364-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C ST CLAIR MO
2011-04-21 636-402-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GRAYSUMMIT MO
2011-04-21 636-582-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C UNION MO
2011-04-21 636-944-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C WARE MO
2011-04-19 636-200-1XXX 1000–1999Assigned ONVOY, LLC - MO 093F MANCHESTER MO
2011-04-19 636-368-9XXX 9000–9999Assigned ONVOY, LLC - MO 093F CHESTERFLD MO
2011-04-19 636-725-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J FSSCRSTLCY MO
2011-04-18 636-492-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 FENTON MO
2011-04-18 636-492-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 FENTON MO
2011-03-17 636-433-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 MARTHASVL MO
2011-03-02 636-385-1XXX 1000–1999Assigned BRIGHTSPEED OF MISSOURI, LLC 9787 OFALLON MO
2011-03-02 636-462-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TROY MO
2011-02-25 636-487-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST CHARLES MO
2011-02-25 636-669-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST CHARLES MO
2011-02-25 636-866-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST CHARLES MO
2011-02-25 636-875-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST PETERS MO
2011-02-24 636-481-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J HILLSBORO MO
2011-02-22 636-439-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 OFALLON MO

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.