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 206
QWEST CORPORATION 243
T-MOBILE USA, INC. 95
ONVOY, LLC - WA 72
NEW CINGULAR WIRELESS PCS, LLC 58
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 57
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
— 206-898 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
— 206-901 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-902 0XXX6XXX7XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
— 206-903 none assigned yet which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-905 1XXX4XXX6XXX7XXX8XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
— 206-906 9XXX which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-907 not yet reported which blocks → SPOK, INC. 6630 SEATTLE WA
— 206-909 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
— 206-910 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
— 206-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 206-913 1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-914 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
— 206-915 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
— 206-916 not yet reported which blocks → SPOK, INC. 6630 SEATTLE WA
— 206-917 not yet reported which blocks → SPOK, INC. 6630 SEATTLE WA
— 206-919 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
— 206-920 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
— 206-922 0XXX2XXX3XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
— 206-923 7XXX8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-925 0XXX1XXX2XXX3XXX · 3 holders which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-926 3XXX4XXX7XXX8XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 SEATTLE WA
— 206-930 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
— 206-931 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
— 206-932 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-933 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-934 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
— 206-935 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-937 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-938 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-940 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
— 206-941 4XXX which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
— 206-947 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
— 206-948 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
— 206-949 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
— 206-950 not yet reported which blocks → WA
— 206-953 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
— 206-954 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
— 206-955 not yet reported which blocks → SPOK, INC. 6630 SEATTLE WA
— 206-956 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-957 not yet reported which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
— 206-958 not yet reported which blocks → WA
— 206-959 not yet reported which blocks → WA
— 206-962 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
— 206-963 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
— 206-965 0XXX1XXX5XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-969 not yet reported which blocks → QWEST CORPORATION 9638 SEATTLE WA
— 206-971 1XXX2XXX6XXX9XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
— 206-972 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
— 206-973 0XXX2XXX3XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
— 206-976 not yet reported which blocks → 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.