NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 517
WOW! INTERNET, CABLE AND PHONE 29
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
2012-05-03 517-412-7XXX 7000–7999Assigned WOW! INTERNET, CABLE AND PHONE 961J GRANDLEDGE MI
2012-05-03 517-459-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J PARMA MI
2012-05-03 517-624-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J DE WITT MI
2012-05-03 517-890-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J HANOVER MI
2012-05-03 517-903-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J BATH MI
2012-05-03 517-910-4XXX 4000–4999Assigned WOW! INTERNET, CABLE AND PHONE 961J ONONDAGA MI
2012-05-03 517-919-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J LAINGSBURG MI
2012-05-03 517-926-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J GRASS LAKE MI
2012-05-03 517-929-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J HOMER MI
2012-05-03 517-984-5XXX 5000–5999Assigned WOW! INTERNET, CABLE AND PHONE 961J WEBBERVL MI
2012-05-03 517-985-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J STOCKBDG MI
2012-05-03 517-996-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J WILLIAMSTN MI
2012-05-02 517-224-8XXX 8000–8999Assigned WOW! INTERNET, CABLE AND PHONE 961J POTTERVL MI
2012-05-02 517-235-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J DIMONDALE MI
2012-05-02 517-325-1XXX 1000–1999Assigned WOW! INTERNET, CABLE AND PHONE 961J LANSING MI
2012-05-02 517-604-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J MASON MI
2012-05-02 517-709-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J HOLT MI
2012-05-02 517-715-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J FOWLERVL MI
2012-05-02 517-741-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J UNION CITY MI
2012-05-02 517-748-2XXX 2000–2999Assigned WOW! INTERNET, CABLE AND PHONE 961J JACKSON MI
2012-05-02 517-836-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J EATON RPD MI
2012-05-02 517-878-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J LESLIE MI
2012-05-02 517-895-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J CONCORD MI
2012-05-02 517-900-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J BUNDY HILL MI
2012-05-02 517-909-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J DANSVILLE MI
2012-05-02 517-948-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J MULLIKEN MI
2012-05-02 517-994-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J PORTLAND MI
2012-05-02 517-997-6XXX 6000–6999Assigned WOW! INTERNET, CABLE AND PHONE 961J CHARLOTTE MI
2012-04-04 517-343-2XXX 2000–2999Assigned WOW! INTERNET, CABLE AND PHONE 961J ALBION MI

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.