NumberResearch Membership · Data 09/25/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/25/2026

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 425
ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 56
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
2017-09-14 425-447-0XXX 0000–0999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-447-1XXX 1000–1999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-447-2XXX 2000–2999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-447-3XXX 3000–3999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-447-4XXX 4000–4999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-447-5XXX 5000–5999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-447-6XXX 6000–6999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-447-7XXX 7000–7999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-447-8XXX 8000–8999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-447-9XXX 9000–9999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-544-0XXX 0000–0999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-544-1XXX 1000–1999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-544-2XXX 2000–2999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-544-3XXX 3000–3999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-544-4XXX 4000–4999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-544-5XXX 5000–5999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-544-6XXX 6000–6999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-544-7XXX 7000–7999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-544-8XXX 8000–8999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2017-09-14 425-544-9XXX 9000–9999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2011-09-12 425-558-2XXX 2000–2999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2011-09-08 425-265-6XXX 6000–6999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 EVERETT WA
2010-11-10 425-404-4XXX 4000–4999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 EVERETT WA
2010-11-10 425-404-5XXX 5000–5999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 EVERETT WA
2010-11-10 425-404-6XXX 6000–6999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 EVERETT WA
2010-11-10 425-404-7XXX 7000–7999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 EVERETT WA
2010-11-10 425-404-8XXX 8000–8999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 EVERETT WA
2007-10-08 425-538-0XXX 0000–0999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2007-10-08 425-538-1XXX 1000–1999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2007-10-08 425-538-2XXX 2000–2999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2007-10-08 425-538-3XXX 3000–3999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2007-10-08 425-538-4XXX 4000–4999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2007-10-08 425-538-5XXX 5000–5999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2007-10-08 425-538-6XXX 6000–6999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2007-10-08 425-538-7XXX 7000–7999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2007-10-08 425-538-8XXX 8000–8999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2007-10-08 425-538-9XXX 9000–9999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2007-02-02 425-302-0XXX 0000–0999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 BOTHELL WA
2007-02-02 425-302-1XXX 1000–1999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 BOTHELL WA
2007-02-02 425-302-2XXX 2000–2999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 BOTHELL WA
2007-02-02 425-302-3XXX 3000–3999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 BOTHELL WA
2007-02-02 425-302-4XXX 4000–4999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 BOTHELL WA
2007-02-02 425-302-5XXX 5000–5999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 BOTHELL WA
2007-02-02 425-302-6XXX 6000–6999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 BOTHELL WA
2007-02-02 425-302-7XXX 7000–7999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 BOTHELL WA
2007-02-02 425-302-8XXX 8000–8999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 BOTHELL WA
2007-02-02 425-302-9XXX 9000–9999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 BOTHELL WA
2006-08-17 425-844-5XXX 5000–5999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 BOTHELL WA
2004-09-15 425-225-8XXX 8000–8999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 SILVERLAKE WA
2003-03-12 425-908-4XXX 4000–4999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 BOTHELL WA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.