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
2005-08-29 509-209-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 SPOKANE WA
2005-08-29 509-621-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J NEWMANLAKE WA
2005-08-25 509-264-6XXX 6000–6999Assigned METROPCS, INC. 5562 WENATCHEE WA
2005-08-18 509-361-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MOSES LAKE WA
2005-08-11 509-237-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EPHRATA WA
2005-08-11 509-551-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2005-08-11 509-793-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MOSES LAKE WA
2005-08-11 509-793-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MOSES LAKE WA
2005-07-22 509-393-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WENATCHEE WA
2005-07-22 509-637-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WH SALMON WA
2005-07-20 509-205-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2005-07-13 509-339-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PULLMAN WA
2005-07-11 509-671-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 NEWPORT WA
2005-07-07 509-341-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E TWISP WA
2005-06-29 509-607-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELLENSBURG WA
2005-06-27 509-429-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OMAK WA
2005-06-23 509-630-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2005-06-23 509-630-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2005-06-22 509-295-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 CLARKSTON WA
2005-06-21 509-214-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E NEWMANLAKE WA
2005-06-21 509-214-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E NEWMANLAKE WA
2005-06-21 509-254-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLARKSTON WA
2005-06-21 509-254-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLARKSTON WA
2005-06-21 509-254-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLARKSTON WA
2005-06-21 509-292-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E ELK-GRNBLF WA
2005-06-21 509-292-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J ELK-GRNBLF WA
2005-06-21 509-498-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHENEY WA
2005-06-21 509-559-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHENEY WA
2005-06-21 509-559-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHENEY WA
2005-06-21 509-559-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHENEY WA
2005-06-21 509-651-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E DEER PARK WA
2005-06-21 509-651-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E DEER PARK WA
2005-06-07 509-570-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2005-06-07 509-570-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2005-06-07 509-570-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2005-06-07 509-570-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2005-06-07 509-570-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2005-06-07 509-590-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2005-06-07 509-590-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2005-06-01 509-855-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 MOSES LAKE WA
2005-06-01 509-855-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 MOSES LAKE WA
2005-05-26 509-431-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MOSES LAKE WA
2005-05-16 509-492-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PASCO WA
2005-05-16 509-492-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PASCO WA
2005-05-10 509-398-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EPHRATA WA
2005-05-05 509-429-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OMAK WA
2005-04-28 509-643-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUNNYSIDE WA
2005-03-31 509-305-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SUNNYSIDE WA
2005-03-22 509-388-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2005-03-22 509-388-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA 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.