NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2020-04-13 | 267-807 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PHLDLPHZN1 | PA |
| 2019-06-10 | 267-837 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PENNSBURG | PA |
| 2016-03-28 | 267-778 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PHPHSBZN40 | PA |
| 2013-11-05 | 267-686 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PHLDLPHZN4 | PA |
| 2013-09-13 | 267-512 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PHPHSBZN43 | PA |
| 2013-06-17 | 267-789 | 0–9 XXXall 10 · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PHPHSBZN43 | PA |
| 2013-04-09 | 267-928 | 0–9 XXXall 10 · 2 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PHLDLPHZN1 | PA |
| 2012-09-25 | 267-538 | 0–9 XXXall 10 · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PHLDLPHZN4 | PA |
| 2009-05-04 | 267-273 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PHLDLPHZN1 | PA |
| 2005-04-11 | 267-382 | 0–9 XXXall 10 · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | SOUDERTON | PA |
| 2004-11-22 | 267-544 | 0–9 XXXall 10 · 8 holders which blocks → | COMCAST IP PHONE, LLC | 318J | BUCKINGHAM | PA |
| 2004-11-19 | 267-293 | 0–9 XXXall 10 · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | CARVERSVL | PA |
| 2001-05-16 | 267-878 | 0–9 XXXall 10 · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PHPHSBZN42 | PA |
| 2001-03-13 | 267-239 | 1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PHLDLPHZN1 | PA |
| 2001-03-13 | 267-332 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PHPHSBZN41 | PA |
| — | 267-731 | 1XXX6XXX7XXX which blocks → | COMCAST IP PHONE, LLC | 318J | PHLDLPHZN4 | PA |
| — | 267-766 | 0–9 XXXall 10 · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PHLDLPHZN3 | PA |
| — | 267-797 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | MORRISVL | PA |
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.