NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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, 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
2015-09-10 425-979-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2015-09-10 425-979-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2015-09-08 425-245-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2015-09-08 425-595-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2015-09-08 425-595-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2015-09-04 425-287-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2015-09-04 425-287-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2015-09-03 425-236-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2015-09-03 425-549-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CARNATION WA
2015-08-21 425-523-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2015-08-21 425-523-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2015-08-21 425-598-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2015-08-21 425-598-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2015-08-21 425-598-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2015-08-21 425-598-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2015-08-21 425-598-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2015-08-19 425-416-9XXX 9000–9999Assigned QWEST CORPORATION 9638 ISSAQUAH WA
2015-08-12 425-507-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2015-08-12 425-507-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2015-08-11 425-563-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2015-07-31 425-678-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2015-07-27 425-287-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2015-07-27 425-598-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2015-07-27 425-598-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2015-07-24 425-433-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MAPLE VLY WA
2015-07-13 425-526-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2015-07-13 425-902-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2015-07-09 425-598-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2015-07-08 425-689-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 AMES LAKE WA
2015-06-23 425-979-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2015-06-17 425-287-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2015-06-17 425-529-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E RENTON WA
2015-06-17 425-595-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EVERETT WA
2015-06-11 425-395-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2015-06-09 425-363-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 NORTH BEND WA
2015-05-29 425-559-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2015-05-29 425-559-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2015-05-29 425-559-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2015-05-29 425-559-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2015-05-28 425-399-1XXX 1000–1999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2015-05-27 425-390-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RENTON WA
2015-05-27 425-559-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BELLEVUE WA
2015-05-27 425-569-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MAPLE VLY WA
2015-05-27 425-651-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ISSAQUAH WA
2015-05-19 425-835-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2015-05-18 425-245-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2015-05-13 425-309-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2015-05-13 425-309-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2015-05-11 425-305-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2015-05-11 425-399-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SILVERLAKE 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.