OCN 4420 · Regional Bell Operating Company
Frontier California Inc
Part of the Frontier group — 89 OCNs across 30 states · 25,565 blocks combined.
Holding: Frontier Communications Corporation
Total blocks
530
Recent (18 mo)
0
Medium
0
Old
20
Area codes
10
States
1
Address
600 Hidden Rdg, HQ E02G72
Irving, TX 75038-3809
600 Hidden Rdg, HQ E02G72
Irving, TX 75038-3809
Website
frontier.com
frontier.com
First assigned block
2003-09-24
2003-09-24
Last assigned block
2018-03-27
2018-03-27
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Carrier website
frontier.com — opens in a new tab
HQ — Irving, TX
Block portfolio at a glance
By age
- Recent (0) — last 18 mo
- Medium (0)
- Old (20)
- Undated (510)
Footprint by state
Stronger blue = more blocks issued in that state. ● marks states with activity in the last 18 months.
- California CA · 530
Top area codes
Bars show total blocks; red overlay is recent.
Block assignments by year
Best vanity numbers from Frontier California Inc's recent issuances
Numbers in blocks issued in the last 18 months whose digits spell a useful word. Filter by state and category to find one for your business. ★ marks Mike's curated standouts.
| Number | Spells | Category | State | Block issued |
|---|---|---|---|---|
| (945) 368-4527 ★ | DOUGLAS | Male / Masculine Names | TX | 2025-02-04 |
| (945) 368-4468 ★ | DOUGHNUTS | Supermarkets / Deli / Groceries | TX | 2025-02-04 |
| (945) 368-4687 ★ | ENVIOUS | Home | TX | 2025-02-04 |
| (945) 368-4746 ★ | ENVISION | Vision / Optometry / Glasses | TX | 2025-02-04 |
| (945) 368-4735 ★ | ENTIRELY | General | TX | 2025-02-04 |
| (945) 368-4766 | ENVIRON | Technical / Electronics / Software | TX | 2025-02-04 |
| (945) 368-4853 | ENTITLE | Insurance | TX | 2025-02-04 |
Want one of these or something similar? Request the number from this carrier and we'll route the request.
Sister OCNs in the Frontier group
Same customer-facing carrier, different state-registered OCN. Combined stats are on the Frontier group page.
Sister OCNs under Frontier Communications Corporation
| OCN | Company | Total | Recent |
|---|---|---|---|
| 9147 | Southern New England Telephone Company dba Frontier Communications of Connecticut | 2,723 | 0 |
| 2319 | Frontier California Inc | 2,618 | 0 |
| 4344 | Frontier Southwest Incorporated dba Frontier Communications of Texas | 2,210 | 2 |
| 0328 | Frontier Florida LLC dba Frontier Communications of Florida | 1,999 | 0 |
| 9214 | Frontier West Virginia Inc | 1,044 | 0 |
| 0096 | Citizens Telecommunications Company of New York Inc dba Frontier Communicatons of New York | 878 | 0 |
| 4324 | Ziply Fiber Northwest LLC dba Ziply Fiber | 783 | 0 |
| 0121 | Frontier Telephone of Rochester Inc | 638 | 0 |
| 1123 | Citizens Telecommunications Company of Minnesota LLC dba Frontier Citizens Communications of MN | 570 | 0 |
| 1183 | Citizens Telecommunications Company of Illinois dba Frontier Citizens Communications of Illinois | 517 | 0 |
| 4323 | Ziply Fiber Northwest LLC dba Ziply Fiber | 488 | 0 |
| 0161 | Commonwealth Telephone Company LLC | 482 | 0 |