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 360
QWEST CORPORATION 170
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 82
ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 81
T-MOBILE USA, INC. 66
LEVEL 3 COMMUNICATIONS, LLC - WA 61
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
2014-09-18 360-819 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 OLYMPIA WA
2014-08-20 360-986 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ABERDEEN WA
2014-08-08 360-839 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 VANCOUVER WA
2014-06-26 360-947 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J VANCOUVER WA
2014-03-13 360-979 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SILVERDALE WA
2014-03-06 360-932 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2014-01-27 360-890 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2013-10-23 360-984 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VANCOUVER WA
2013-04-30 360-972 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E OLYMPIA WA
2013-02-21 360-558 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 VANCOUVER WA
2013-02-08 360-964 0–9 XXXall 10 · 5 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 MONTESANO WA
2012-08-24 360-924 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F ABERDEEN WA
2012-05-11 360-688 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 OLYMPIA WA
2012-01-30 360-949 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VANCOUVER WA
2011-12-27 360-729 0–9 XXXall 10 · 3 holders which blocks → QWEST CORPORATION 9638 VANCOUVER WA
2011-10-04 360-994 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 POULSBO WA
2011-09-07 360-338 0–9 XXXall 10 · 8 holders which blocks → COMCAST IP PHONE, LLC 318J OLYMPIA WA
2011-07-12 360-328 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J SILVERDALE WA
2011-02-25 360-836 0–9 XXXall 10 · 5 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 VANCOUVER WA
2011-01-25 360-975 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VANCOUVER WA
2010-02-12 360-553 0–9 XXXall 10 · 6 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 VANCOUVER WA
2010-01-18 360-865 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SILVERDALE WA
2009-10-22 360-524 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9638 VANCOUVER WA
2009-08-26 360-831 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
2009-06-11 360-602 0–9 XXXall 10 · 6 holders which blocks → ASTOUND BROADBAND, LLC - WA 937F PORT ORCH WA
2009-03-19 360-742 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OLYMPIA WA
2008-11-11 360-953 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 VANCOUVER WA
2008-11-06 360-827 0–9 XXXall 10 · 4 holders which blocks → QWEST CORPORATION 9638 CENTRALIA WA
2008-10-31 360-669 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J CENTRALIA WA
2008-07-30 360-977 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 VANCOUVER WA
2008-07-03 360-489 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J OLYMPIA WA
2008-07-03 360-744 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9638 BREMERTON WA
2008-05-09 360-334 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VANCOUVER WA
2008-03-26 360-955 0XXX1XXX2XXX4XXX5XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J YELM WA
2007-08-03 360-628 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 OLYMPIA WA
2007-06-01 360-716 0–9 XXXwhole prefix which blocks → SALISH NETWORKS, INC. - WA 152H MARYSVILLE WA
2007-04-20 360-989 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 VANCOUVER WA
2007-03-15 360-940 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WA 483E COPALIS WA
2006-10-31 360-718 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VANCOUVER WA
2006-10-04 360-773 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VANCOUVER WA
2005-11-17 360-804 0–9 XXXall 10 · 4 holders which blocks → SKYLINE TELECOM COMPANY - WA 581D SNOHOMISH WA
2005-05-25 360-967 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 CASTLEROCK WA
2005-03-16 360-872 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J ORTING WA
2005-03-16 360-881 0XXX1XXX6XXX7XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J KINGSTON WA
2005-03-16 360-889 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J SO PRAIRIE WA
2004-12-30 360-572 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J MARYSVILLE WA
2004-05-19 360-622 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SAN JUAN WA
2003-04-21 360-783 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → UNITED STATES CELLULAR - WA 6270 LONG BEACH WA
2002-10-17 360-203 0XXX1XXX4XXX5XXX6XXX7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 FORKS WA
2002-10-17 360-208 0–9 XXXall 10 · 5 holders which blocks → UNITED STATES CELLULAR - WA 6270 SOUTH BEND WA

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.