NumberResearchThousands-blocks in 412-504
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 412-504 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
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 412-504-0XXX | 0000–0999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTGSBNZN13 | PA |
| — | 412-504-1XXX | 1000–1999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTGSBNZN13 | PA |
| 2007-03-29 | 412-504-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTGSBNZN13 | PA |
| — | 412-504-3XXX | 3000–3999 | Available | PTGSBNZN13 | PA | ||
| — | 412-504-4XXX | 4000–4999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTGSBNZN13 | PA |
| — | 412-504-5XXX | 5000–5999 | Available | PTGSBNZN13 | PA | ||
| 2019-12-04 | 412-504-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA | 967E | PTGSBNZN13 | PA |
| 2012-01-20 | 412-504-7XXX | 7000–7999 | Assigned | ONVOY, LLC - PA | 547E | PTGSBNZN13 | PA |
| 2020-03-31 | 412-504-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA | 967E | PTGSBNZN13 | PA |
| 2020-11-13 | 412-504-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - PA | 002F | PTGSBNZN13 | PA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.