NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 775
NEVADA BELL 122
ONVOY, LLC - NV 120
NEW CINGULAR WIRELESS PCS, LLC 48
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 42
T-MOBILE USA, INC. 28
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2017-07-19 775-394 7XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NV 4805 MONTELLO NV
2017-07-19 775-396 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - NV 4805 RUBYVALLEY NV
2017-06-22 775-380 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NV 4805 SILVERPEAK NV
2017-06-13 775-271 0XXX1XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 PIOCHE NV
2017-03-03 775-399 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J RENO NV
2017-02-14 775-395 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NV 4805 RENO NV
2016-10-24 775-571 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF NEVADA, LLC - NV 408F PAHRUMP NV
2016-08-15 775-683 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K RENO NV
2016-06-17 775-300 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 RENO NV
2016-05-27 775-774 1XXX4XXX · 2 holders which blocks → WIDE VOICE, LLC - NV 253F COTNWD CRK NV
2016-01-19 775-515 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 CARSONCITY NV
2015-12-09 775-508 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CARSON PL NV
2015-11-19 775-204 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NV 029F RENO NV
2015-10-13 775-505 0–9 XXXall 10 · 6 holders which blocks → SOUTHWEST TELEPHONE COMPANY - NV 218G PAHRUMP NV
2015-10-07 775-507 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NV 4805 RENO NV
2015-09-29 775-504 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J OWYHEE NV
2015-03-13 775-499 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NV 029F RENO NV
2014-10-14 775-430 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 CARSONCITY NV
2014-10-14 775-501 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C RENO NV
2014-10-09 775-470 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 RENO NV
2014-07-17 775-440 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 RENO NV
2013-03-18 775-409 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G RENO NV
2013-02-15 775-432 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F RENO NV
2012-02-17 775-405 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NV 4805 ELY NV
2012-02-15 775-870 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 RENO NV
2012-02-01 775-404 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV 7376 FERNLEY NV
2012-01-11 775-644 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C BAKER NV
2012-01-04 775-386 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RENO NV
2011-12-14 775-360 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NV 4805 RENO NV
2011-12-09 775-301 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 CARSONCITY NV
2011-11-10 775-203 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 RENO NV
2011-10-20 775-210 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SILVER SPG NV
2011-08-25 775-276 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 RENO NV
2011-04-13 775-500 0XXX2XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CARLIN NV
2011-01-17 775-525 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 187G RENO NV
2010-12-02 775-400 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CARSONCITY NV
2010-08-06 775-407 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WELLS NV
2010-08-06 775-408 4XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WENDOVER NV
2010-07-12 775-420 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RENO NV
2010-07-02 775-526 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K STAGECOACH NV
2010-05-14 775-382 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NV 029F BEATTY NV
2010-04-28 775-403 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F WINNEMUCCA NV
2010-03-15 775-413 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NV 587C CRYSTALBAY NV
2010-02-12 775-375 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F WINNEMUCCA NV
2009-12-04 775-464 0XXX1XXX6XXX7XXX · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C AUSTIN NV
2009-11-12 775-410 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NV 029F RENO NV
2009-01-08 775-390 not yet reported which blocks → LINCOLN COUNTY TEL. SYSTEM, INC. 2351 TOQUOP NV
2008-10-30 775-737 0–9 XXXall 10 · 5 holders which blocks → UTILITY TELECOM GROUP, LLC - NV 811D RENO NV
2008-08-15 775-384 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NV 029F RENO NV
2008-05-27 775-391 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F RENO NV

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.