NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

4 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 336
HD CARRIER LLC 3
ONVOY, LLC - NC 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
2006-09-11 336-307-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K HIGH POINT NC
2006-09-11 336-313-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K THOMASVL NC
2006-09-11 336-377-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K STANLEYVL NC
2006-09-11 336-394-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K REIDSVILLE NC
2006-09-11 336-525-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K SAXAPAHAW NC
2006-09-11 336-617-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K GREENSBORO NC
2006-09-11 336-617-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K GREENSBORO NC
2006-09-11 336-617-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K GREENSBORO NC
2006-09-11 336-617-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K GREENSBORO NC
2006-09-11 336-799-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K RANDLEMAN NC
2006-09-11 336-859-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K DENTON NC
2006-09-11 336-923-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K OLDTOWN NC
2006-09-11 336-946-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K LEWISVILLE NC
2006-09-08 336-258-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ELKIN NC
2006-09-08 336-443-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K DOBSON NC
2006-09-08 336-444-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K PILOT MT NC
2006-09-08 336-551-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K BOONVILLE NC
2006-09-08 336-573-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K STONEVILLE NC
2006-09-08 336-591-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K WALNUTCOVE NC
2006-09-08 336-627-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K EDEN NC
2006-09-08 336-754-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K WALKERTOWN NC
2006-09-08 336-755-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K MOUNT AIRY NC
2006-09-08 336-849-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K YADKINVL NC
2006-09-08 336-949-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K MADISON NC
2006-08-31 336-521-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K ASHEBORO NC
2006-08-31 336-740-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 GREENSBORO NC
2006-08-24 336-425-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEXINGTON NC
2006-08-21 336-426-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ELKIN NC
2006-08-21 336-542-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2006-08-21 336-542-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2006-08-21 336-542-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2006-08-17 336-331-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2006-08-16 336-792-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 BURLINGTON NC
2006-08-16 336-792-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 BURLINGTON NC
2006-08-14 336-289-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 HIGH POINT NC
2006-08-14 336-389-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 GREENSBORO NC
2006-08-14 336-389-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 GREENSBORO NC
2006-08-14 336-389-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 GREENSBORO NC
2006-08-02 336-501-9XXX 9000–9999Assigned READY TELECOM, INC. - NC 5307 GREENSBORO NC
2006-07-28 336-455-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2006-07-28 336-455-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2006-07-28 336-589-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 EDEN NC
2006-07-28 336-870-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 HIGH POINT NC
2006-07-25 336-478-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 GREENSBORO NC
2006-07-17 336-423-3XXX 3000–3999Assigned METROPCS, INC. 5562 KERNERSVL NC
2006-06-26 336-473-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WINSTN SAL NC
2006-06-26 336-473-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WINSTN SAL NC
2006-06-26 336-981-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NOWILKESBO NC
2006-06-23 336-447-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 GIBSONVL NC
2006-06-13 336-462-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 WINSTN SAL NC

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.