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
2023-03-30 509-224-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHENEY WA
2023-03-24 509-231-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E KENNEWICK WA
2023-03-24 509-274-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUNNYSIDE WA
2023-03-24 509-589-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NEWPORT WA
2023-03-23 509-652-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E SPRINGDALE WA
2023-03-20 509-645-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E BREWSTER WA
2023-03-17 509-299-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E MEDICAL LK WA
2023-03-17 509-360-0XXX 0000–0999Assigned ZIPLY FIBER NORTHWEST LLC DBA ZIPLY FIBER 427K WALLAWALLA WA
2023-03-17 509-827-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RICHLAND WA
2023-03-16 509-206-9XXX 9000–9999Assigned TELNYX LLC 073H CLARKSTON WA
2023-03-16 509-642-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E HARRAH WA
2023-03-10 509-231-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2023-03-03 509-268-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2023-02-24 509-231-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2023-02-24 509-231-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 KENNEWICK WA
2023-02-20 509-231-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E KENNEWICK WA
2023-02-17 509-743-0XXX 0000–0999Assigned TELNYX LLC 073H SPOKANE WA
2023-02-03 509-365-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E LYLE WA
2023-02-02 509-224-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E CHENEY WA
2023-02-02 509-296-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E PULLMAN WA
2023-01-31 509-273-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ELLENSBURG WA
2023-01-30 509-245-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E SPANGLE WA
2023-01-26 509-253-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E HARRINGTON WA
2023-01-20 509-797-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 QUINCY WA
2023-01-13 509-428-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RITZVILLE WA
2023-01-13 509-980-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CONNELL WA
2023-01-12 509-743-1XXX 1000–1999Assigned NUSO, LLC 732J SPOKANE WA
2023-01-09 509-239-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E EDWALLTYLR WA
2022-12-15 509-231-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E KENNEWICK WA
2022-12-12 509-286-1XXX 1000–1999Assigned TELNYX LLC 073H ROCKFORD WA
2022-12-08 509-206-8XXX 8000–8999Assigned TELNYX LLC 073H CLARKSTON WA
2022-12-06 509-268-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E YAKIMA WA
2022-12-06 509-268-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E YAKIMA WA
2022-12-06 509-268-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E YAKIMA WA
2022-11-21 509-852-6XXX 6000–6999Assigned TERRA NOVA TELECOM INC. 145J CLE ELUM WA
2022-11-17 509-905-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E PASCO WA
2022-10-26 509-384-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E ROOSEVELT WA
2022-10-26 509-906-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EPHRATA WA
2022-10-24 509-298-8XXX 8000–8999Assigned COMMIO, LLC 939H MOSES LAKE WA
2022-10-24 509-564-7XXX 7000–7999Assigned COMMIO, LLC 939H DEER PARK WA
2022-10-21 509-268-0XXX 0000–0999Assigned ZIPLY FIBER NORTHWEST LLC DBA ZIPLY FIBER 427K YAKIMA WA
2022-10-21 509-296-0XXX 0000–0999Assigned COMMIO, LLC 939H PULLMAN WA
2022-10-19 509-273-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2022-10-18 509-986-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2022-10-18 509-986-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2022-10-17 509-743-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H SPOKANE WA
2022-10-17 509-743-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H SPOKANE WA
2022-10-17 509-743-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H SPOKANE WA
2022-10-11 509-236-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E EDWALLTYLR WA
2022-10-11 509-236-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E EDWALLTYLR 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.