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
2004-07-19 509-844-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2004-07-19 509-844-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2004-07-13 509-302-5XXX 5000–5999Assigned METROPCS, INC. 5562 PASCO WA
2004-07-02 509-780-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CLARKSTON WA
2004-06-30 509-486-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E TONASKET WA
2004-06-15 509-320-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 STARBUCK WA
2004-06-14 509-714-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2004-06-08 509-429-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OMAK WA
2004-06-07 509-778-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PROSSER WA
2004-06-04 509-284-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TEKOA WA
2004-06-04 509-594-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2004-06-04 509-594-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2004-06-04 509-643-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SUNNYSIDE WA
2004-06-01 509-852-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E CLE ELUM WA
2004-05-27 509-552-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E CLARKSTON WA
2004-05-27 509-681-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E COULEECITY WA
2004-05-26 509-550-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E NEWPORT WA
2004-05-24 509-714-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2004-05-24 509-714-9XXX 9000–9999Assigned METROPCS, INC. 5562 SPOKANE WA
2004-05-19 509-630-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 WENATCHEE WA
2004-05-17 509-977-1XXX 1000–1999Assigned INLAND CELLULAR LLC 1477 CRESTON WA
2004-05-17 509-977-2XXX 2000–2999Assigned INLAND CELLULAR LLC 1477 CRESTON WA
2004-05-13 509-348-0XXX 0000–0999Assigned INLAND CELLULAR LLC 1477 DAVENPORT WA
2004-05-13 509-348-1XXX 1000–1999Assigned INLAND CELLULAR LLC 1477 DAVENPORT WA
2004-05-13 509-552-0XXX 0000–0999Assigned INLAND CELLULAR LLC 1484 CLARKSTON WA
2004-05-13 509-552-2XXX 2000–2999Assigned INLAND CELLULAR LLC 1484 CLARKSTON WA
2004-05-13 509-977-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 CRESTON WA
2004-05-10 509-741-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WENATCHEE WA
2004-05-06 509-219-1XXX 1000–1999Assigned AXXIS COMMUNICATION, INC. - WA 5844 STEVENSON WA
2004-05-06 509-219-2XXX 2000–2999Assigned AXXIS COMMUNICATION, INC. - WA 5844 STEVENSON WA
2004-05-06 509-288-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 COLFAX WA
2004-05-06 509-428-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 RITZVILLE WA
2004-05-06 509-557-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 OMAK WA
2004-05-06 509-560-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 OROVILLE WA
2004-05-06 509-563-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 COLVILLE WA
2004-05-06 509-566-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 POMEROY WA
2004-05-06 509-587-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BREWSTER WA
2004-05-06 509-779-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 CURLEW WA
2004-05-04 509-304-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CLE ELUM WA
2004-04-30 509-304-5XXX 5000–5999Assigned UNITED STATES CELLULAR - WA 6270 CLE ELUM WA
2004-04-29 509-302-7XXX 7000–7999Assigned METROPCS, INC. 5562 PASCO WA
2004-04-29 509-305-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SUNNYSIDE WA
2004-04-20 509-391-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUNNYSIDE WA
2004-04-14 509-387-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WENATCHEE WA
2004-04-06 509-594-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2004-04-06 509-594-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2004-04-06 509-594-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2004-03-29 509-594-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 YAKIMA WA
2004-03-29 509-637-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WH SALMON WA
2004-03-26 509-429-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OMAK 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.