NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

6 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2011-03-21 870-537-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C JOINER AR
2011-03-21 870-573-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C PARAGOULD AR
2011-03-21 870-629-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C W MEMPHIS AR
2011-03-21 870-630-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C FORREST CY AR
2011-03-21 870-655-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C WILSON AR
2011-03-21 870-658-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LUXORA AR
2011-03-21 870-697-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C HICKORYRDG AR
2011-03-21 870-744-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TUPELO AR
2011-03-21 870-753-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C HELENA AR
2011-03-21 870-755-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C PARKIN AR
2011-03-21 870-768-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C MORO AR
2011-03-21 870-792-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C EARLE AR
2011-03-21 870-799-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C NEWARK AR
2011-03-16 870-824-6XXX 6000–6999Assigned E. RITTER COMMUNICATIONS, LLC 128L BLYTHEVL AR
2011-03-15 870-215-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PARAGOULD AR
2011-03-15 870-215-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PARAGOULD AR
2011-03-15 870-253-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JONESBORO AR
2011-03-15 870-253-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JONESBORO AR
2011-03-15 870-277-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JONESBORO AR
2011-03-15 870-632-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAKE VLG AR
2011-03-10 870-581-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 FORREST CY AR
2011-03-01 870-224-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C MONTICELLO AR
2011-03-01 870-469-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C WILMAR AR
2011-03-01 870-479-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GRADY AR
2011-03-01 870-501-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C MCGEHEE AR
2011-03-01 870-538-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C DERMOTT AR
2011-03-01 870-546-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C NORPHLET AR
2011-03-01 870-554-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MOUNTHOLLY AR
2011-03-01 870-596-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C VILLAGE AR
2011-03-01 870-632-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LAKE VLG AR
2011-03-01 870-644-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C WATSON AR
2011-03-01 870-685-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C CHIDESTER AR
2011-03-01 870-695-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C MCNEIL AR
2011-03-01 870-696-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MACEDONIA AR
2011-03-01 870-737-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PORTLAND AR
2011-03-01 870-766-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C ALTHEIMER AR
2011-03-01 870-786-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C STEPHENS AR
2011-03-01 870-877-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ARKANSASCY AR
2011-03-01 870-943-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C HUTTIG AR
2011-03-01 870-962-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C URBANA AR
2011-02-25 870-939-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PINE BLUFF AR
2011-02-25 870-939-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PINE BLUFF AR
2011-02-25 870-939-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PINE BLUFF AR
2011-02-24 870-576-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OSCEOLA AR
2011-02-24 870-945-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORREST CY AR
2011-01-12 870-530-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JONESBORO AR
2011-01-12 870-819-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JONESBORO AR
2011-01-12 870-819-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JONESBORO AR
2011-01-05 870-665-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 EL DORADO AR
2011-01-05 870-665-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 EL DORADO AR

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.