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
2021-10-01 509-603-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SPOKANE WA
2021-10-01 509-603-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SPOKANE WA
2021-10-01 509-603-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SPOKANE WA
2021-09-15 509-514-2XXX 2000–2999Assigned TDS METROCOM, LLC 520K SPOKANE WA
2021-09-13 509-616-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H SPOKANE WA
2021-09-13 509-616-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H SPOKANE WA
2021-09-13 509-616-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H SPOKANE WA
2021-09-13 509-616-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H SPOKANE WA
2021-09-13 509-616-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H SPOKANE WA
2021-09-13 509-616-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H SPOKANE WA
2021-09-13 509-616-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H SPOKANE WA
2021-09-01 509-560-2XXX 2000–2999Assigned TERRA NOVA TELECOM INC. 145J OROVILLE WA
2021-08-19 509-338-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PULLMAN WA
2021-08-19 509-505-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2021-08-19 509-505-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2021-08-19 509-856-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2021-08-19 509-859-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2021-08-04 509-957-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPOKANE WA
2021-08-03 509-418-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SPOKANE WA
2021-08-03 509-518-6XXX 6000–6999Assigned COMMIO, LLC 939H KENNEWICK WA
2021-08-03 509-870-1XXX 1000–1999Assigned COMMIO, LLC 939H KENNEWICK WA
2021-08-03 509-870-5XXX 5000–5999Assigned COMMIO, LLC 939H KENNEWICK WA
2021-07-30 509-506-3XXX 3000–3999Assigned COMMIO, LLC 939H YAKIMA WA
2021-07-30 509-506-4XXX 4000–4999Assigned COMMIO, LLC 939H YAKIMA WA
2021-07-30 509-506-6XXX 6000–6999Assigned COMMIO, LLC 939H YAKIMA WA
2021-07-30 509-506-7XXX 7000–7999Assigned COMMIO, LLC 939H YAKIMA WA
2021-07-29 509-918-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2021-07-22 509-502-7XXX 7000–7999Assigned UNITED STATES CELLULAR - WA 6270 SUNNYSIDE WA
2021-07-06 509-401-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F POMEROY WA
2021-07-06 509-512-4XXX 4000–4999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F MOSES LAKE WA
2021-07-06 509-890-7XXX 7000–7999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F DEER PARK WA
2021-07-06 509-905-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F PASCO WA
2021-07-06 509-913-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OTHELLO WA
2021-07-01 509-852-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F CLE ELUM WA
2021-06-30 509-383-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E GRANGER WA
2021-06-30 509-383-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E GRANGER WA
2021-06-29 509-365-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 LYLE WA
2021-06-18 509-518-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2021-06-18 509-518-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2021-06-16 509-201-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2021-06-16 509-306-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2021-06-01 509-213-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E SPRINGDALE WA
2021-06-01 509-213-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E SPRINGDALE WA
2021-06-01 509-250-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E GOLDENDALE WA
2021-06-01 509-253-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E HARRINGTON WA
2021-06-01 509-259-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E SPRAGUE WA
2021-06-01 509-266-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E MATHEWSCOR WA
2021-06-01 509-281-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E WH SALMON WA
2021-06-01 509-283-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E ROCKFORD WA
2021-06-01 509-284-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E TEKOA 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.