Carriers issuing the most numbers right now
Ranked by blocks assigned in the last 18 months. Each tile is a carrier group — multiple state-level OCNs rolled together.
Wireless Carrier · 74 OCNs · 54 states
AT&T
Wireless Carrier · 143 OCNs · 53 states
Verizon
Competitive Local Exchange Carrier · 41 OCNs · 41 states
Onvoy
Personal Communications Service (Wireless) · 23 OCNs · 53 states
T-Mobile
Wireless Carrier · 1 OCN · 51 states
Onvoy Spectrum
IP-Enabled Service / VoIP · 2 OCNs · 49 states
Terra Nova Telecom
Wireless Carrier · 20 OCNs · 20 states
U.S. Cellular
IP-Enabled Service / VoIP · 1 OCN · 46 states
IP Horizon
Competitive Local Exchange Carrier · 10 OCNs · 11 states
Neutral Tandem
Wireless Carrier · 1 OCN · 50 states
Dish Wireless
Competitive Local Exchange Carrier · 49 OCNs · 49 states
Bandwidth.com
IP-Enabled Service / VoIP · 1 OCN · 51 states
HD Carrier
Competitive Local Exchange Carrier · 39 OCNs · 39 states
Peerless Network
IP-Enabled Service / VoIP · 1 OCN · 47 states
Wavenation
IP-Enabled Service / VoIP · 4 OCNs · 50 states
Brightlink Communications
Competitive Local Exchange Carrier · 199 OCNs · 53 states
Centurylink
IP-Enabled Service / VoIP · 1 OCN · 29 states
TWC IP Enabled Services
IP-Enabled Service / VoIP · 2 OCNs · 53 states
Comcast
IP-Enabled Service / VoIP · 1 OCN · 27 states
Charter IP Enabled Services
Competitive Local Exchange Carrier · 1 OCN · 2 states
Yorkstream Communications
IP-Enabled Service / VoIP · 1 OCN · 52 states
TELNYX
IP-Enabled Service / VoIP · 1 OCN · 15 states
EON Telecom
IP-Enabled Service / VoIP · 1 OCN · 29 states
Leap Telecom
Competitive Local Exchange Carrier · 3 OCNs · 4 states
LiveWire Telecom
Competitive Local Exchange Carrier · 34 OCNs · 33 states
Wide Voice
Browse by area code
Top 24 area codes by recent activity. Click for the full carrier list.
Browse by carrier type
Active OCNs by type
- Competitive Local Exchange Carrier (8,533)
- Underlying Local Exchange Carrier (3,577)
- Local Reseller (2,247)
- IP-Enabled Service / VoIP (1,865)
- Incumbent Local Exchange Carrier (1,786)
- Wireless Carrier (1,358)
- Interexchange (long-distance) Carrier (396)
- Personal Communications Service (Wireless) (246)
- Administrative / Reserved (237)
- Competitive Access Provider (227)
- Wireless Reseller (135)
- Regional Bell Operating Company (109)
- International Carrier (25)
- PCS Reseller (16)
Competitive Local Exchange Carrier
Underlying Local Exchange Carrier
Local Reseller
IP-Enabled Service / VoIP
Incumbent Local Exchange Carrier
Wireless Carrier
Interexchange (long-distance) Carrier
Personal Communications Service (Wireless)
Administrative / Reserved
Competitive Access Provider
Wireless Reseller
Regional Bell Operating Company
International Carrier
PCS Reseller
Ethernet Exchange Carrier
Competitive Access Provider
Personal Communications Service (Wireless)
Largest carrier groups (lifetime block count)
| Group | Holding | OCNs | States | NPAs | Total blocks | Recent |
|---|---|---|---|---|---|---|
| AT&T | AT&T Inc | 74 | 54 | 377 | 265,508 | 22,243 |
| T-Mobile | T-Mobile Usa Inc | 23 | 53 | 375 | 237,998 | 6,835 |
| Verizon | Cellco Partnership | 143 | 53 | 378 | 236,111 | 9,455 |
| Onvoy | 41 | 41 | 307 | 159,817 | 7,245 | |
| Centurylink | Level 3 Financing Inc | 199 | 53 | 347 | 115,262 | 305 |
| Bandwidth.com | Bandwidth Inc | 49 | 49 | 351 | 81,224 | 758 |
| Windstream | Windstream Corporation | 59 | 46 | 306 | 47,855 | 43 |
| Onvoy Spectrum | 1 | 51 | 354 | 31,551 | 2,586 | |
| Neutral Tandem | 10 | 11 | 53 | 27,664 | 1,100 | |
| Frontier | Frontier Communications Corporation | 89 | 30 | 139 | 25,565 | 4 |
| Comcast | Comcast Cable Communication LLC | 2 | 53 | 297 | 24,236 | 160 |
| Peerless Network | 39 | 39 | 313 | 20,707 | 544 | |
| TELNYX | 1 | 52 | 336 | 13,466 | 137 | |
| AT&T Southeast | AT&T Inc | 1 | 8 | 27 | 13,075 | — |
| Commio | 2 | 51 | 323 | 9,899 | — | |
| U.S. Cellular | United States Cellular Operating Company | 20 | 20 | 63 | 9,885 | 1,985 |
| TWC IP Enabled Services | 1 | 29 | 116 | 9,517 | 162 | |
| Fractel | 1 | 48 | 273 | 6,780 | — | |
| AT&T Illinois | AT&T Inc | 1 | 2 | 14 | 6,645 | — |
| MULTIPLE OCN LISTING | 1 | 85 | 453 | 6,039 | — | |
| Ton80 Communications | 1 | 45 | 258 | 5,877 | — | |
| AT&T Michigan | AT&T Inc | 1 | 1 | 11 | 5,035 | — |
| Charter IP Enabled Services | 1 | 27 | 112 | 4,857 | 154 | |
| AT&T Ohio | AT&T Inc | 1 | 1 | 11 | 4,377 | — |
| TPX Communications | 1 | 18 | 83 | 4,359 | 42 |
