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
TELEPORT COMMUNICATIONS AMERICA, LLC - WA 22
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
2025-10-23 206-863 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
2020-05-04 206-990 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
2006-10-10 206-473 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
2002-06-17 206-393 2XXX7XXX8XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
2001-04-23 206-212 0XXX1XXX4XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 DES MOINES WA
2001-04-23 206-268 none assigned yet which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
2001-04-23 206-505 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
2001-04-23 206-694 2XXX3XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
2001-04-23 206-695 2XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
2001-04-23 206-834 5XXX6XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
2001-04-23 206-892 8XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
— 206-201 0XXX1XXX2XXX3XXX4XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 BAINBDG IS WA
— 206-252 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
— 206-288 3XXX9XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
— 206-289 0XXX1XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 RICHMNDBCH WA
— 206-403 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
— 206-655 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
— 206-662 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
— 206-664 1XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
— 206-674 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
— 206-676 2XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
— 206-830 0XXX8XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE 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.