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
2014-12-26 509-578-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RICHLAND WA
2014-12-26 509-584-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WAPATO WA
2014-12-26 509-587-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BREWSTER WA
2014-12-26 509-632-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J COULEECITY WA
2014-12-26 509-634-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NESPELEM WA
2014-12-26 509-659-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RITZVILLE WA
2014-12-26 509-677-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LIND WA
2014-12-26 509-686-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BRIDGEPORT WA
2014-12-26 509-722-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHEWELAH WA
2014-12-26 509-738-0XXX 0000–0999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KETTLE FLS WA
2014-12-26 509-745-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DOUGLASCO WA
2014-12-26 509-785-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 GEORGE WA
2014-12-26 509-796-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J REARDAN WA
2014-12-26 509-829-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TOPPENISH WA
2014-12-26 509-874-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WHITE SWAN WA
2014-12-26 509-973-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WHITSTRAN WA
2014-12-26 509-977-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CRESTON WA
2014-12-24 509-559-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHENEY WA
2014-12-24 509-639-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALMIRA WA
2014-12-23 509-203-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GRANDVIEW WA
2014-12-23 509-233-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 LOON LAKE WA
2014-12-23 509-239-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 EDWALLTYLR WA
2014-12-23 509-258-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SPRINGDALE WA
2014-12-23 509-303-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PROSSER WA
2014-12-23 509-337-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WAITSBURG WA
2014-12-23 509-341-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TWISP WA
2014-12-23 509-377-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J COLUMBIA WA
2014-12-23 509-383-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GRANGER WA
2014-12-23 509-394-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TOUCHET WA
2014-12-23 509-486-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TONASKET WA
2014-12-23 509-593-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WALLAWALLA WA
2014-12-23 509-598-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SPOKANE WA
2014-12-23 509-621-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 NEWMANLAKE WA
2014-12-23 509-640-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J COLVILLE WA
2014-12-23 509-642-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HARRAH WA
2014-12-23 509-646-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WASHTUCNA WA
2014-12-23 509-673-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TIETON WA
2014-12-23 509-732-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 NORTHPORT WA
2014-12-23 509-769-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CLARKSTON WA
2014-12-23 509-821-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DEER PARK WA
2014-12-23 509-875-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PATERSON WA
2014-12-23 509-896-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MABTON WA
2014-12-23 509-932-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MATTAWA WA
2014-12-22 509-223-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 LOOMIS WA
2014-12-22 509-282-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CONNELL WA
2014-12-22 509-297-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 MATHEWSCOR WA
2014-12-22 509-316-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PASCO WA
2014-12-22 509-320-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STARBUCK WA
2014-12-22 509-560-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OROVILLE WA
2014-12-22 509-653-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 NACHES 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.