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 425
T-MOBILE USA, INC. 616
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 419
ONVOY, LLC - WA 386
NEW CINGULAR WIRELESS PCS, LLC 345
COMCAST IP PHONE, LLC 166
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
2017-10-12 425-800-2XXX 2000–2999Assigned HD CARRIER LLC 321J BELLEVUE WA
2017-10-11 425-507-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2017-10-11 425-507-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2017-10-10 425-382-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2017-10-10 425-626-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2017-10-10 425-677-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2017-10-06 425-448-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2017-10-06 425-448-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2017-10-06 425-448-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2017-10-06 425-448-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
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
2017-09-14 425-626-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2017-09-14 425-977-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2017-09-12 425-362-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2017-09-12 425-399-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2017-09-12 425-549-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E CARNATION WA
2017-09-08 425-222-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E FALL CITY WA
2017-09-08 425-276-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E RENTON WA
2017-09-08 425-292-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E NORTH BEND WA
2017-09-08 425-320-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E EVERETT WA
2017-09-08 425-358-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E MAPLE VLY WA
2017-09-08 425-434-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E SNOQUMPASS WA
2017-09-08 425-588-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2017-09-08 425-589-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2017-09-08 425-599-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E HALLS LAKE WA
2017-09-08 425-651-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E ISSAQUAH WA
2017-09-08 425-659-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2017-09-08 425-689-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E AMES LAKE WA
2017-09-05 425-434-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SNOQUMPASS WA
2017-08-16 425-616-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2017-08-14 425-800-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELLEVUE WA

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.