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 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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2002-10-02 360-915 0–9 XXXall 10 · 4 holders which blocks → TSS DIGITAL SERVICES, LCC - WA 1488 OLYMPIA WA
2002-09-19 360-860 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KINGSTON WA
2002-09-19 360-861 0–9 XXXall 10 · 6 holders which blocks → UNITED STATES CELLULAR - WA 6270 ELMA WA
2002-08-15 360-346 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ELMA WA
2002-07-18 360-593 2XXX3XXX4XXX5XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ABERDEEN WA
2002-07-18 360-912 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 PT ANGELES WA
2002-07-18 360-913 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 MARYSVILLE WA
2002-07-18 360-914 2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 OAK HARBOR WA
2002-06-20 360-774 2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PTTOWNSEND WA
2002-06-20 360-775 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PT ANGELES WA
2002-05-16 360-550 0–9 XXXall 10 · 4 holders which blocks → INTRADO COMMUNICATIONS, LLC 841C BREMERTON WA
2002-05-16 360-562 0–9 XXXall 10 · 6 holders which blocks → INTRADO COMMUNICATIONS, LLC 834C LONGVIEW WA
2002-05-07 360-761 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BUCKLEY WA
2002-04-30 360-229 2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SHELTON WA
2002-04-30 360-367 2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ENUMCLAW WA
2002-02-21 360-388 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CENTRALIA WA
2001-12-21 360-244 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH WA
2001-11-20 360-632 2XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OAK HARBOR WA
2001-10-22 360-232 2XXX3XXX4XXX6XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J LONGVIEW WA
2001-10-22 360-597 3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J VANCOUVER WA
2001-10-22 360-689 2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 SILVERDALE WA
2001-06-25 360-209 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ABERDEEN WA
2001-06-25 360-584 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → RAINIER CONNECT, INC. - WA 7720 OLYMPIA WA
2001-04-23 360-851 0XXX1XXX4XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 BLACKDIMND WA
2001-04-16 360-224 not yet reported which blocks → T-MOBILE USA, INC. 6529 WHATCOMCTY WA
2001-04-16 360-421 not yet reported which blocks → T-MOBILE USA, INC. 6529 MT VERNON WA
2001-04-16 360-440 not yet reported which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2001-04-16 360-556 not yet reported which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2001-04-16 360-672 3XXX6XXX7XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 OAK HARBOR WA
2001-04-16 360-888 not yet reported which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2001-03-19 360-545 0XXX1XXX2XXX3XXX5XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SHELTON WA
2001-03-19 360-703 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 LONGVIEW WA
2001-02-22 360-487 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VANCOUVER WA
2001-02-22 360-500 0XXX2XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → METROPCS, INC. 5562 ABERDEEN WA
2001-02-15 360-472 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SAN JUAN WA
2001-01-25 360-243 1XXX2XXX3XXX5XXX6XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SNOHOMISH WA
2001-01-25 360-286 0XXX2XXX7XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SILVERDALE WA
2001-01-25 360-390 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PTTOWNSEND WA
2001-01-25 360-450 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
— 360-200 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 LONGVIEW WA
— 360-201 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WHATCOMCTY WA
— 360-202 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MT VERNON WA
— 360-204 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9638 SILVERDALE WA
— 360-205 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELFAIR WA
— 360-207 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WA 006F PT ANGELES WA
— 360-210 1XXX2XXX3XXX6XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J CAMAS WA
— 360-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 360-212 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-213 3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 VANCOUVER WA
— 360-214 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 LONG BEACH WA

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.