NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

6 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 870
ONVOY, LLC - AR 5
AHOI LLC 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
2013-12-30 870-228-5XXX 5000–5999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G HELENA AR
2013-12-30 870-406-3XXX 3000–3999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G GURDON AR
2013-12-30 870-679-1XXX 1000–1999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G WALNUT RDG AR
2013-12-30 870-901-3XXX 3000–3999Assigned CSC VOICE, LLC 612K MAGNOLIA AR
2013-12-30 870-962-4XXX 4000–4999Assigned CSC VOICE, LLC 612K URBANA AR
2013-12-19 870-464-1XXX 1000–1999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G ARKADLPHIA AR
2013-12-19 870-569-7XXX 7000–7999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G BATESVILLE AR
2013-12-19 870-569-8XXX 8000–8999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G BATESVILLE AR
2013-12-17 870-469-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 WILMAR AR
2013-12-13 870-303-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAZEN AR
2013-12-12 870-568-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 ARKADLPHIA AR
2013-12-11 870-200-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F NASHVILLE AR
2013-12-11 870-260-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F ARKADLPHIA AR
2013-12-11 870-292-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F HOPE AR
2013-12-11 870-573-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 PARAGOULD AR
2013-12-10 870-767-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TUCKERMAN AR
2013-11-27 870-594-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 FORREST CY AR
2013-11-19 870-808-4XXX 4000–4999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G TUCKERMAN AR
2013-11-19 870-808-5XXX 5000–5999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G TUCKERMAN AR
2013-11-14 870-701-3XXX 3000–3999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G MT HOME AR
2013-11-14 870-701-4XXX 4000–4999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G MT HOME AR
2013-11-14 870-701-5XXX 5000–5999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G MT HOME AR
2013-11-14 870-920-1XXX 1000–1999Assigned AIRECAST, LLC - AR 240H WARREN AR
2013-11-08 870-724-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 GURDON AR
2013-11-08 870-799-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWARK AR
2013-11-08 870-945-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FORREST CY AR
2013-11-07 870-376-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 BATESVILLE AR
2013-11-01 870-206-7XXX 7000–7999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G JONESBORO AR
2013-11-01 870-444-4XXX 4000–4999Assigned CSC VOICE, LLC 612K EL DORADO AR
2013-11-01 870-444-5XXX 5000–5999Assigned CSC VOICE, LLC 612K EL DORADO AR
2013-11-01 870-520-1XXX 1000–1999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G JONESBORO AR
2013-11-01 870-520-2XXX 2000–2999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G JONESBORO AR
2013-11-01 870-520-3XXX 3000–3999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G JONESBORO AR
2013-11-01 870-520-4XXX 4000–4999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G JONESBORO AR
2013-11-01 870-520-5XXX 5000–5999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G JONESBORO AR
2013-11-01 870-520-6XXX 6000–6999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G JONESBORO AR
2013-10-28 870-324-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PIGGOTT AR
2013-10-18 870-949-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MAGNOLIA AR
2013-10-16 870-201-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 NEWPORT AR
2013-09-12 870-280-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 HARRISON AR
2013-08-28 870-384-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C CAVE CITY AR
2013-08-28 870-626-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C MAGNOLIA AR
2013-07-25 870-206-9XXX 9000–9999Assigned E. RITTER COMMUNICATIONS, LLC 128L JONESBORO AR
2013-07-24 870-202-1XXX 1000–1999Assigned E. RITTER COMMUNICATIONS, LLC 128L POCAHONTAS AR
2013-07-24 870-298-0XXX 0000–0999Assigned E. RITTER COMMUNICATIONS, LLC 128L MARIANNA AR
2013-06-21 870-576-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 OSCEOLA AR
2013-06-14 870-581-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FORREST CY AR
2013-06-13 870-714-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C HELENA AR
2013-06-11 870-551-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J W MEMPHIS AR
2013-05-30 870-594-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 FORREST CY AR

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.