NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
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 |
|---|---|---|---|---|---|---|
| 2025-12-15 | 870-960 | 1XXX which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | PINE BLUFF | AR |
| 2022-05-26 | 870-851 | 0XXX7XXX · 2 holders which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | CRAWFODSVL | AR |
| 2022-05-26 | 870-889 | 0XXX1XXX2XXX3XXX7XXX8XXX · 6 holders which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | HUGHES | AR |
| 2022-05-26 | 870-891 | 0XXX1XXX2XXX7XXX · 4 holders which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | NEWARK | AR |
| 2018-02-14 | 870-380 | 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | PINE BLUFF | AR |
| 2017-08-01 | 870-205 | 0–9 XXXall 10 · 5 holders which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | PARAGOULD | AR |
| 2017-01-19 | 870-938 | 0–9 XXXall 10 · 5 holders which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | JONESBORO | AR |
| 2010-11-23 | 870-936 | 0–9 XXXwhole prefix which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | JONESBORO | AR |
| 2007-06-04 | 870-207 | 0–9 XXXwhole prefix which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | JONESBORO | AR |
| 2007-01-30 | 870-418 | not yet reported which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | TRUMANN | AR |
| 2007-01-30 | 870-516 | not yet reported which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | MONETTE | AR |
| 2007-01-30 | 870-570 | not yet reported which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | MANILA | AR |
| 2007-01-30 | 870-616 | not yet reported which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | LAKE CITY | AR |
| 2007-01-30 | 870-756 | not yet reported which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | BAY | AR |
| 2007-01-30 | 870-956 | not yet reported which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | CARAWAY | AR |
| 2007-01-30 | 870-957 | not yet reported which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | LEACHVILLE | AR |
| 2004-03-10 | 870-785 | 0XXX1XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | OIL TROUGH | AR |
| 2001-05-08 | 870-493 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | DELL | AR |
| 2001-05-08 | 870-527 | 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | BRINKLEY | AR |
| 2001-05-08 | 870-569 | 0–9 XXXall 10 · 6 holders which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | BATESVILLE | AR |
| 2001-05-08 | 870-614 | 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | LUXORA | AR |
| 2001-05-08 | 870-637 | 0–9 XXXall 10 · 8 holders which blocks → | E. RITTER COMMUNICATIONS, LLC | 128L | WALNUT RDG | AR |
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.