NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 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, all time — NPA 870
LEVEL 3 COMMUNICATIONS, LLC - AR 259
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
2024-06-18 870-327-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 JONESBORO AR
2024-04-09 870-812-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 FLIPPIN AR
2023-08-22 870-649-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 STUTTGART AR
2023-04-14 870-472-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 NASHVILLE AR
2023-02-14 870-344-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 DE WITT AR
2022-12-27 870-660-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 DES ARC AR
2022-08-04 870-903-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 FULTON AR
2022-08-03 870-377-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 DUMAS AR
2022-08-02 870-696-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 MACEDONIA AR
2022-08-02 870-859-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 NOSPRINGHL AR
2022-01-11 870-760-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LOCKESBURG AR
2021-10-25 870-894-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 BRADLEY AR
2021-09-28 870-287-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 MINERALSPG AR
2021-09-14 870-641-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 JONESBORO AR
2021-07-20 870-412-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 MONTICELLO AR
2021-02-09 870-628-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 STAR CITY AR
2020-12-28 870-997-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 EUDORA AR
2020-12-24 870-610-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 HATFIELD AR
2020-11-30 870-205-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 PARAGOULD AR
2020-10-16 870-790-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 JONESBORO AR
2020-07-07 870-719-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 HARRISON AR
2020-06-30 870-498-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 CAMDEN AR
2020-06-09 870-558-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 JONESBORO AR
2020-06-04 870-539-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LEACHVILLE AR
2020-06-04 870-561-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 MANILA AR
2020-04-27 870-769-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 BIGGERS AR
2020-02-19 870-218-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 PINE BLUFF AR
2020-02-04 870-300-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 DERMOTT AR
2019-11-12 870-639-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 EL DORADO AR
2019-08-15 870-409-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 BLYTHEVL AR
2019-06-28 870-659-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 STUTTGART AR
2019-06-06 870-590-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 SMACKOVER AR
2019-06-06 870-690-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 MCGEHEE AR
2019-06-06 870-953-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 STAMPS AR
2019-05-08 870-721-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 WASHINGTON AR
2019-04-23 870-666-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 JONESBORO AR
2019-04-12 870-716-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 HARRISON AR
2019-04-09 870-374-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 GOULD AR
2019-03-26 870-714-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 HELENA AR
2019-02-12 870-380-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 PINE BLUFF AR
2018-12-12 870-444-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 EL DORADO AR
2018-12-04 870-454-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 CAMDEN AR
2018-11-20 870-580-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 MT HOME AR
2018-10-31 870-497-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 JONESBORO AR
2018-07-18 870-380-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 PINE BLUFF AR
2018-07-18 870-444-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 EL DORADO AR
2018-07-18 870-970-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 FORREST CY AR
2018-06-19 870-388-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 SARATOGA AR
2018-06-19 870-921-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LEWISVILLE AR
2018-06-13 870-528-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 JESUP 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.