NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

2 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, last 30 days — NPA 425
NEW CINGULAR WIRELESS PCS, LLC 2
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
2008-02-13 425-440-4XXX 4000–4999Assigned QWEST CORPORATION 9638 BELLEVUE WA
2008-02-06 425-977-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 HALLS LAKE WA
2008-01-25 425-999-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2008-01-25 425-999-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2008-01-25 425-999-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2008-01-25 425-999-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2008-01-08 425-292-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E NORTH BEND WA
2008-01-08 425-297-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2008-01-04 425-441-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E FALL CITY WA
2007-12-27 425-512-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2007-12-27 425-512-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2007-12-27 425-583-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2007-12-27 425-583-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2007-12-27 425-583-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2007-12-13 425-512-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2007-12-13 425-512-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2007-12-13 425-877-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2007-12-13 425-877-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2007-11-27 425-563-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2007-11-21 425-999-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELLEVUE WA
2007-11-08 425-591-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2007-10-16 425-949-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL 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
2007-10-05 425-583-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2007-10-05 425-583-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2007-10-05 425-583-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2007-10-05 425-583-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2007-10-05 425-583-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2007-09-27 425-495-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 BELLEVUE WA
2007-09-27 425-614-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2007-09-26 425-495-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2007-09-26 425-614-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2007-09-14 425-495-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2007-09-14 425-495-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2007-09-14 425-495-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2007-09-14 425-495-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2007-09-14 425-495-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2007-09-14 425-495-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2007-09-13 425-296-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2007-09-11 425-200-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2007-09-11 425-207-6XXX 6000–6999Assigned METROPCS, INC. 5562 RENTON WA

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.