NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 336
BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 166
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 90
SUNCOM DBA T-MOBILE USA 63
BRIGHTSPEED OF NORTH CAROLINA, LLC 58
NEW CINGULAR WIRELESS PCS, LLC - GA 46
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2026-05-29 336-507 0XXX1XXX · 2 holders which blocks → ONVOY, LLC - NC 638E NOWILKESBO NC
2024-03-11 336-743 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H GREENSBORO NC
2023-08-23 336-919 1XXX2XXX · 2 holders which blocks → ONVOY, LLC - NC 638E MILTON NC
2023-08-23 336-980 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - NC 638E WALNUTCOVE NC
2023-08-02 336-704 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NC 638E KERNERSVL NC
2023-08-02 336-729 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NC 638E RANDLEMAN NC
2023-08-02 336-828 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E ROXBORO NC
2023-08-02 336-910 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E ELKIN NC
2023-07-25 336-336 1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → AT&T - LOCAL 7421 JULIAN NC
2020-05-12 336-569 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E DOBSON NC
2019-06-21 336-974 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E RUFFIN NC
2019-05-07 336-943 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 HIGH POINT NC
2019-04-24 336-780 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NC 638E LEXINGTON NC
2019-01-25 336-979 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WINSTN SAL NC
2018-12-17 336-968 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D WINSTN SAL NC
2018-11-29 336-962 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E GREENSBORO NC
2018-11-21 336-640 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 SPARTA NC
2018-10-31 336-947 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 HIGH POINT NC
2018-08-20 336-800 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - NC 638E QUAKER GAP NC
2018-08-20 336-810 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NC 638E TIMBERLAKE NC
2018-01-31 336-304 0XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BOOMER NC
2018-01-31 336-400 0XXX3XXX4XXX6XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CHAMPION NC
2018-01-31 336-563 0XXX3XXX8XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CLINGMAN NC
2017-12-20 336-206 0XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BALDWIN NC
2017-12-04 336-647 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ROXBORO NC
2017-10-09 336-654 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MILTON NC
2017-08-30 336-860 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D GREENSBORO NC
2017-06-26 336-960 0–9 XXXall 10 · 2 holders which blocks → RIVERSTREET COMMUNICATIONS OF NO CAROLINA - NC 769H LEXINGTON NC
2017-05-23 336-646 0–9 XXXall 10 · 4 holders which blocks → SOUTH CAROLINA NET, INC. - NC 511C GREENSBORO NC
2017-05-10 336-967 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E KERNERSVL NC
2017-05-09 336-966 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-03-21 336-604 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NC 638E GREENSBORO NC
2017-03-06 336-942 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 HIGH POINT NC
2017-02-13 336-568 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NOWILKESBO NC
2016-12-05 336-840 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H GREENSBORO NC
2016-11-09 336-894 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
2016-09-26 336-666 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F WINSTN SAL NC
2016-08-17 336-502 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 HAYS NC
2016-06-20 336-807 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 HIGH POINT NC
2016-05-09 336-396 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E RUFFIN NC
2016-03-08 336-660 0–9 XXXall 10 · 4 holders which blocks → RIVERSTREET COMMUNICATIONS OF NO CAROLINA - NC 769H GREENSBORO NC
2016-03-07 336-571 0–9 XXXall 10 · 5 holders which blocks → RIVERSTREET COMMUNICATIONS OF NO CAROLINA - NC 769H ELKIN NC
2016-03-02 336-579 0–9 XXXall 10 · 4 holders which blocks → SOUTH CAROLINA NET, INC. - NC 511C GREENSBORO NC
2016-02-12 336-762 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K THOMASVL NC
2016-01-22 336-690 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 GREENSBORO NC
2016-01-21 336-930 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NC 638E WINSTN SAL NC
2015-12-04 336-276 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NC 638E WINSTN SAL NC
2015-11-23 336-203 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NC 638E GREENSBORO NC
2015-11-11 336-955 0–9 XXXall 10 · 6 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 WINSTN SAL NC
2015-10-09 336-865 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 WINSTN SAL NC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.