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
2007-04-16 509-895-3XXX 3000–3999Assigned UNITED STATES CELLULAR - WA 6270 YAKIMA WA
2007-04-06 509-460-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2007-04-06 509-460-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2007-04-04 509-315-0XXX 0000–0999Assigned ELTOPIA COMMUNICATIONS, LLC - WA 663D SPOKANE WA
2007-04-03 509-863-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2007-04-03 509-868-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J SPOKANE WA
2007-03-30 509-619-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E KENNEWICK WA
2007-03-29 509-420-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 RICHLAND WA
2007-03-23 509-207-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E REPUBLIC WA
2007-03-23 509-223-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E LOOMIS WA
2007-03-23 509-283-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E ROCKFORD WA
2007-03-23 509-284-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E TEKOA WA
2007-03-23 509-285-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E OAKESDALE WA
2007-03-23 509-287-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E FARMINGTON WA
2007-03-23 509-485-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E MOLSON WA
2007-03-23 509-486-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E TONASKET WA
2007-03-23 509-569-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E ROSALIA WA
2007-03-23 509-653-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E NACHES WA
2007-03-23 509-658-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E NILE WA
2007-03-23 509-779-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E CURLEW WA
2007-03-19 509-331-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OTHELLO WA
2007-03-19 509-944-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2007-03-19 509-944-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2007-03-19 509-944-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2007-03-19 509-944-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2007-03-13 509-431-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MOSES LAKE WA
2007-03-13 509-460-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 KENNEWICK WA
2007-03-13 509-895-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2007-03-13 509-895-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2007-03-12 509-337-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WAITSBURG WA
2007-03-12 509-362-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E SPOKANE WA
2007-03-12 509-420-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K RICHLAND WA
2007-03-12 509-876-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WALLAWALLA WA
2007-03-12 509-895-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K YAKIMA WA
2007-03-08 509-416-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PASCO WA
2007-03-08 509-420-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 RICHLAND WA
2007-03-08 509-420-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RICHLAND WA
2007-03-08 509-420-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RICHLAND WA
2007-03-08 509-460-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KENNEWICK WA
2007-03-06 509-205-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2007-03-06 509-374-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2007-03-05 509-380-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K PASCO WA
2007-03-05 509-619-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K KENNEWICK WA
2007-02-22 509-233-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E LOON LAKE WA
2007-02-22 509-255-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E LIBERTY LK WA
2007-02-22 509-258-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E SPRINGDALE WA
2007-02-22 509-337-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E WAITSBURG WA
2007-02-22 509-349-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E WARDEN WA
2007-02-22 509-382-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E DAYTON WA
2007-02-22 509-394-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E TOUCHET 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.