NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

8 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 509
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 3
NEW CINGULAR WIRELESS PCS, LLC 2
EXIANT COMMUNICATIONS LLC 2
LEVEL 3 COMMUNICATIONS, LLC - WA 1
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
2004-03-26 509-481-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPOKANE WA
2004-03-24 509-288-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COLFAX WA
2004-03-19 509-302-8XXX 8000–8999Assigned METROPCS, INC. 5562 PASCO WA
2004-03-15 509-594-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2004-03-12 509-594-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2004-03-10 509-868-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2004-03-08 509-863-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2004-03-08 509-863-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2004-03-08 509-863-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2004-03-08 509-863-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2004-03-08 509-863-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2004-02-19 509-778-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROSSER WA
2004-02-13 509-855-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MOSES LAKE WA
2004-02-06 509-318-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E CONNELL WA
2004-01-26 509-637-1XXX 1000–1999Assigned AXXIS COMMUNICATION, INC. - WA 5844 WH SALMON WA
2004-01-26 509-637-2XXX 2000–2999Assigned AXXIS COMMUNICATION, INC. - WA 5844 WH SALMON WA
2004-01-26 509-772-1XXX 1000–1999Assigned AXXIS COMMUNICATION, INC. - WA 5844 GOLDENDALE WA
2004-01-26 509-772-2XXX 2000–2999Assigned AXXIS COMMUNICATION, INC. - WA 5844 GOLDENDALE WA
2004-01-15 509-432-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PULLMAN WA
2004-01-13 509-432-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E PULLMAN WA
2003-12-17 509-338-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PULLMAN WA
2003-12-12 509-228-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 SPOKANE WA
2003-12-10 509-293-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WENATCHEE WA
2003-11-04 509-956-6XXX 6000–6999Assigned METROPCS, INC. 5562 WALLAWALLA WA
2003-10-21 509-630-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2003-10-21 509-860-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2003-10-08 509-859-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELLENSBURG WA
2003-09-26 509-238-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 ELK-GRNBLF WA
2003-09-26 509-631-3XXX 3000–3999Assigned COMPUTERS 5*, INC. DBA LOCALTEL - WA 3229 COULEE DAM WA
2003-09-26 509-681-2XXX 2000–2999Assigned COMPUTERS 5*, INC. DBA LOCALTEL - WA 3229 COULEECITY WA
2003-09-25 509-237-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EPHRATA WA
2003-09-23 509-304-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CLE ELUM WA
2003-09-22 509-391-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUNNYSIDE WA
2003-09-17 509-435-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2003-09-17 509-435-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2003-09-17 509-435-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2003-09-17 509-435-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2003-09-17 509-435-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2003-09-17 509-931-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2003-09-17 509-931-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SPOKANE WA
2003-09-17 509-931-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2003-09-17 509-931-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2003-09-17 509-931-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2003-09-17 509-931-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2003-09-17 509-931-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2003-09-17 509-931-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2003-09-17 509-931-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2003-09-17 509-931-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2003-08-04 509-492-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PASCO WA
2003-07-16 509-449-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BRIDGEPORT 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.