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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2011-05-23 509-295-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F CLARKSTON WA
2011-05-23 509-318-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E CONNELL WA
2011-05-23 509-387-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WENATCHEE WA
2011-05-20 509-713-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K RICHLAND WA
2011-05-16 509-828-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2011-05-12 509-648-8XXX 8000–8999Assigned INLAND CELLULAR LLC 1484 ST JOHN WA
2011-05-10 509-361-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MOSES LAKE WA
2011-05-10 509-572-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KENNEWICK WA
2011-05-10 509-678-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E COWICHE WA
2011-05-06 509-828-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2011-04-28 509-229-7XXX 7000–7999Assigned INLAND CELLULAR LLC 1484 UNIONTOWN WA
2011-04-26 509-572-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K KENNEWICK WA
2011-04-20 509-941-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2011-04-19 509-263-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2011-04-19 509-828-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2011-04-12 509-497-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E BENTONCITY WA
2011-04-12 509-572-1XXX 1000–1999Assigned METROPCS, INC. 5562 KENNEWICK WA
2011-04-12 509-641-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E WILBUR WA
2011-04-12 509-738-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E KETTLE FLS WA
2011-03-31 509-759-7XXX 7000–7999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 YAKIMA WA
2011-03-29 509-592-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E PULLMAN WA
2011-03-29 509-671-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E NEWPORT WA
2011-03-08 509-759-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2011-03-08 509-759-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2011-03-08 509-759-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2011-03-08 509-759-9XXX 9000–9999Assigned METROPCS, INC. 5562 YAKIMA WA
2011-03-02 509-305-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SUNNYSIDE WA
2011-03-02 509-387-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 WENATCHEE WA
2011-03-02 509-591-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2011-02-28 509-240-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WALLAWALLA WA
2011-02-28 509-721-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E DAVENPORT WA
2011-02-25 509-227-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2011-02-25 509-329-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2011-02-14 509-361-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MOSES LAKE WA
2011-02-07 509-795-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2011-01-31 509-851-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 PASCO WA
2011-01-28 509-498-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHENEY WA
2011-01-25 509-426-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2011-01-25 509-440-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2011-01-19 509-263-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2011-01-19 509-263-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2011-01-18 509-932-7XXX 7000–7999Assigned UNITED STATES CELLULAR - WA 6270 MATTAWA WA
2011-01-11 509-690-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 COLVILLE WA
2011-01-11 509-795-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2010-12-13 509-214-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E NEWMANLAKE WA
2010-12-10 509-329-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2010-12-10 509-477-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2010-12-09 509-345-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E WILSON CRK WA
2010-12-09 509-781-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROSSER WA
2010-12-08 509-565-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E MEDICAL LK 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.