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
2015-05-08 336-842-2XXX 2000–2999Assigned ONVOY, LLC - NC 638E WINSTN SAL NC
2015-05-07 336-296-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KING NC
2015-05-07 336-490-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 DENTON NC
2015-05-07 336-537-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 SOUTHMONT NC
2015-05-07 336-590-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LEXINGTON NC
2015-05-07 336-619-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WELCOME NC
2015-05-07 336-642-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 RURAL HALL NC
2015-05-07 336-866-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 LEWISVILLE NC
2015-04-23 336-639-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BURLINGTON NC
2015-04-23 336-639-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BURLINGTON NC
2015-04-03 336-781-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 HIGH POINT NC
2015-04-01 336-897-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K GREENSBORO NC
2015-04-01 336-897-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K GREENSBORO NC
2015-04-01 336-897-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K GREENSBORO NC
2015-04-01 336-897-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K GREENSBORO NC
2015-04-01 336-904-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K KERNERSVL NC
2015-03-16 336-530-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 ELKIN NC
2015-03-16 336-900-0XXX 0000–0999Assigned ONVOY, LLC - NC 638E GREENSBORO NC
2015-03-16 336-900-1XXX 1000–1999Assigned ONVOY, LLC - NC 638E GREENSBORO NC
2015-03-16 336-900-2XXX 2000–2999Assigned ONVOY, LLC - NC 638E GREENSBORO NC
2015-03-10 336-539-3XXX 3000–3999Assigned METROPCS, INC. 5562 BURLINGTON NC
2015-03-10 336-539-4XXX 4000–4999Assigned METROPCS, INC. 5562 BURLINGTON NC
2015-03-10 336-539-5XXX 5000–5999Assigned METROPCS, INC. 5562 BURLINGTON NC
2015-03-10 336-628-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K ASHEBORO NC
2015-03-10 336-781-9XXX 9000–9999Assigned METROPCS, INC. 5562 HIGH POINT NC
2015-03-10 336-792-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K BURLINGTON NC
2015-03-10 336-843-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K LEXINGTON NC
2015-03-10 336-999-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K WINSTN SAL NC
2015-03-10 336-999-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K WINSTN SAL NC
2015-03-06 336-594-9XXX 9000–9999Assigned METROPCS, INC. 5562 STANLEYVL NC
2015-03-06 336-866-9XXX 9000–9999Assigned METROPCS, INC. 5562 LEWISVILLE NC
2015-03-06 336-920-9XXX 9000–9999Assigned METROPCS, INC. 5562 WALKERTOWN NC
2015-03-05 336-279-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2015-03-05 336-279-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2015-03-05 336-757-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 WINSTN SAL NC
2015-03-05 336-778-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 WINSTN SAL NC
2015-03-04 336-653-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 ASHEBORO NC
2015-03-02 336-313-1XXX 1000–1999Assigned METROPCS, INC. 5562 THOMASVL NC
2015-03-02 336-515-2XXX 2000–2999Assigned METROPCS, INC. 5562 KERNERSVL NC
2015-03-02 336-954-2XXX 2000–2999Assigned METROPCS, INC. 5562 GREENSBORO NC
2015-03-02 336-954-3XXX 3000–3999Assigned METROPCS, INC. 5562 GREENSBORO NC
2015-03-02 336-954-6XXX 6000–6999Assigned METROPCS, INC. 5562 GREENSBORO NC
2015-03-02 336-989-6XXX 6000–6999Assigned METROPCS, INC. 5562 HIGH POINT NC
2015-03-02 336-999-1XXX 1000–1999Assigned METROPCS, INC. 5562 WINSTN SAL NC
2015-03-02 336-999-2XXX 2000–2999Assigned METROPCS, INC. 5562 WINSTN SAL NC
2015-02-24 336-804-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K HIGH POINT NC
2015-02-20 336-737-8XXX 8000–8999Assigned RANDOLPH TELEPHONE TELECOMMUNICATIONS, INC. - NC 757D RAMSEUR NC
2015-02-19 336-523-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 ASHEBORO NC
2015-02-19 336-523-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 ASHEBORO NC
2015-02-19 336-523-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 ASHEBORO 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.