NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

7 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
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
2012-04-02 509-707-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F MOSES LAKE WA
2012-03-27 509-440-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2012-03-27 509-491-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K KENNEWICK WA
2012-03-22 509-243-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ASOTIN WA
2012-03-22 509-491-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KENNEWICK WA
2012-02-28 509-713-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RICHLAND WA
2012-02-27 509-318-6XXX 6000–6999Assigned METROPCS, INC. 5562 CONNELL WA
2012-02-21 509-593-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F WALLAWALLA WA
2012-02-17 509-643-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SUNNYSIDE WA
2012-02-10 509-859-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2012-02-03 509-941-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2012-02-01 509-563-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 COLVILLE WA
2012-02-01 509-724-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2012-01-26 509-808-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2012-01-26 509-941-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2012-01-06 509-314-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TOPPENISH WA
2012-01-04 509-941-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 YAKIMA WA
2011-12-16 509-822-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2011-12-05 509-715-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K PULLMAN WA
2011-12-02 509-808-7XXX 7000–7999Assigned METROPCS, INC. 5562 SPOKANE WA
2011-12-02 509-808-8XXX 8000–8999Assigned METROPCS, INC. 5562 SPOKANE WA
2011-12-02 509-941-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2011-11-30 509-346-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OTHELLO WA
2011-11-30 509-515-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SUNNYSIDE WA
2011-11-30 509-717-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EPHRATA WA
2011-11-28 509-412-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K PASCO WA
2011-11-16 509-412-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PASCO WA
2011-11-14 509-859-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELLENSBURG WA
2011-11-14 509-989-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MOSES LAKE WA
2011-11-11 509-322-9XXX 9000–9999Assigned COMPUTERS 5*, INC. DBA LOCALTEL - WA 3229 OMAK WA
2011-11-11 509-774-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WH SALMON WA
2011-10-26 509-302-6XXX 6000–6999Assigned METROPCS, INC. 5562 PASCO WA
2011-10-26 509-515-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SUNNYSIDE WA
2011-10-26 509-941-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2011-10-25 509-303-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PROSSER WA
2011-10-19 509-724-5XXX 5000–5999Assigned QWEST CORPORATION 9638 SPOKANE WA
2011-10-12 509-262-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 DEER PARK WA
2011-10-12 509-393-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WENATCHEE WA
2011-10-12 509-683-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 DOUGLASCO WA
2011-10-12 509-759-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2011-10-12 509-808-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2011-10-12 509-808-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2011-10-05 509-774-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WH SALMON WA
2011-09-22 509-808-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2011-09-19 509-243-8XXX 8000–8999Assigned ELTOPIA COMMUNICATIONS, LLC - WA 663D ASOTIN WA
2011-09-07 509-515-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SUNNYSIDE WA
2011-09-07 509-759-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2011-09-07 509-759-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2011-09-02 509-239-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E EDWALLTYLR WA
2011-08-24 509-715-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PULLMAN 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.