NumberResearchThousands-blocks in 412-204
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 412-204 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 412 blocks
Most active assignees, all time — NPA 412
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
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 412-204-0XXX | 0000–0999 | Reserved | PAETEC ITEL, LLC | 829J | PTTSBGZON8 | PA |
| — | 412-204-1XXX | 1000–1999 | Reserved | PAETEC ITEL, LLC | 829J | PTTSBGZON8 | PA |
| — | 412-204-2XXX | 2000–2999 | Reserved | PAETEC ITEL, LLC | 829J | PTTSBGZON8 | PA |
| — | 412-204-3XXX | 3000–3999 | Reserved | PAETEC ITEL, LLC | 829J | PTTSBGZON8 | PA |
| 2004-03-31 | 412-204-4XXX | 4000–4999 | Assigned | CORE COMMUNICATIONS, INC. - PA | 3806 | PTTSBGZON8 | PA |
| 2025-10-15 | 412-204-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | PTTSBGZON8 | PA |
| 2010-01-21 | 412-204-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - PA | 002F | PTTSBGZON8 | PA |
| 2010-12-08 | 412-204-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - PA | 002F | PTTSBGZON8 | PA |
| 2001-11-05 | 412-204-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PTTSBGZON8 | PA |
| — | 412-204-9XXX | 9000–9999 | Reserved | PAETEC ITEL, LLC | 829J | PTTSBGZON8 | PA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.