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 219
FIRST COMMUNICATIONS, LLC 33
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
2006-04-25 219-227-1XXX 1000–1999Assigned FIRST COMMUNICATIONS, LLC 460K DYER IN
2006-04-25 219-378-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K E CHICAGO IN
2006-04-25 219-390-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K CEDAR LAKE IN
2006-04-25 219-472-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K MERRILLVL IN
2006-04-25 219-473-8XXX 8000–8999Assigned FIRST COMMUNICATIONS, LLC 460K WHITING IN
2006-04-25 219-488-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K CROWNPOINT IN
2006-04-25 219-558-9XXX 9000–9999Assigned FIRST COMMUNICATIONS, LLC 460K ST JOHN IN
2006-04-25 219-629-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K HAMMOND IN
2006-04-25 219-951-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K GARY IN
2006-04-25 219-961-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K HIGHLAND IN
2004-10-11 219-227-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K DYER IN
2004-10-11 219-228-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K HAMMOND IN
2004-10-11 219-232-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K CEDAR LAKE IN
2004-10-11 219-310-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K CROWNPOINT IN
2004-10-11 219-354-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K E CHICAGO IN
2004-10-11 219-484-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K GARY IN
2004-10-11 219-513-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K HIGHLAND IN
2004-10-11 219-552-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K LOWELL IN
2004-10-11 219-558-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K ST JOHN IN
2004-10-11 219-576-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K MERRILLVL IN
2004-10-11 219-655-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K WHITING IN
2004-07-09 219-506-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K MOROCCO IN
2004-07-09 219-992-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K LAKE VLG IN
2002-04-17 219-354-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K E CHICAGO IN
2002-04-17 219-390-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K CEDAR LAKE IN
2002-04-12 219-558-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K ST JOHN IN
2002-03-14 219-226-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K CROWNPOINT IN
2002-03-14 219-381-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K MERRILLVL IN
2002-03-14 219-512-1XXX 1000–1999Assigned FIRST COMMUNICATIONS, LLC 460K GARY IN
2002-03-14 219-552-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K LOWELL IN
2002-03-14 219-655-1XXX 1000–1999Assigned FIRST COMMUNICATIONS, LLC 460K WHITING IN
2002-03-14 219-864-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K DYER IN
2002-03-14 219-961-1XXX 1000–1999Assigned FIRST COMMUNICATIONS, LLC 460K HIGHLAND IN

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.