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
2004-11-22 636-334-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 PACIFIC MO
2004-11-22 636-364-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ST CLAIR MO
2004-11-19 636-923-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 VALLEYPARK MO
2004-11-18 636-352-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ST CHARLES MO
2004-11-17 636-237-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHESTERFLD MO
2004-11-17 636-451-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 GRAYSUMMIT MO
2004-11-17 636-475-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 HERCUMPVLY MO
2004-11-17 636-549-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 EUREKA MO
2004-11-17 636-674-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ANTONIA MO
2004-11-17 636-821-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 POND MO
2004-11-11 636-368-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHESTERFLD MO
2004-10-28 636-352-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ST CHARLES MO
2004-10-22 636-634-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ST CHARLES MO
2004-10-12 636-352-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ST CHARLES MO
2004-10-08 636-352-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ST CHARLES MO
2004-09-28 636-368-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHESTERFLD MO
2004-09-27 636-584-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 UNION MO
2004-09-23 636-293-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OFALLON MO
2004-09-16 636-373-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ST CHARLES MO
2004-09-01 636-524-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FSSCRSTLCY MO
2004-08-16 636-695-3XXX 3000–3999Assigned BRIGHTSPEED OF MISSOURI, LLC 9787 DARDENNE MO
2004-07-16 636-299-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHESTERFLD MO
2004-07-07 636-444-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 VALLEYPARK MO
2004-07-07 636-444-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 VALLEYPARK MO
2004-07-07 636-444-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 VALLEYPARK MO
2004-07-07 636-444-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 VALLEYPARK MO
2004-07-07 636-444-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 VALLEYPARK MO
2004-07-07 636-444-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 VALLEYPARK MO
2004-07-07 636-444-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 VALLEYPARK MO
2004-07-07 636-444-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 VALLEYPARK MO
2004-07-07 636-444-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 VALLEYPARK MO
2004-07-07 636-552-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 MANCHESTER MO
2004-07-07 636-552-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 MANCHESTER MO
2004-07-07 636-552-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 MANCHESTER MO
2004-07-07 636-552-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 MANCHESTER MO
2004-07-07 636-552-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 MANCHESTER MO
2004-07-07 636-552-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 MANCHESTER MO
2004-07-07 636-552-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 MANCHESTER MO
2004-07-07 636-552-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 MANCHESTER MO
2004-07-07 636-600-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 FENTON MO
2004-07-07 636-600-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 FENTON MO
2004-07-07 636-600-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 FENTON MO
2004-07-07 636-600-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 FENTON MO
2004-07-07 636-600-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 FENTON MO
2004-07-07 636-660-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 FENTON MO
2004-07-07 636-660-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 FENTON MO
2004-07-07 636-660-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 FENTON MO
2004-07-07 636-660-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 FENTON MO
2004-07-07 636-720-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 HARVESTER MO
2004-07-07 636-720-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 HARVESTER 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.