# Internet service providers

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Here is a non-comprehensive list of internet service providers by country, which contains criteria about tolerance to self-hosting.

A "no" may cause problems for using your server or may require you to make additional configuration changes. Status in brackets indicates the default behavior.

A list of French and Belgian ISPs is available on the [french page](/isp_fr).

### USA
| Service provider | Box (modem/router) | uPnP available | Port 25 openable | [Hairpinning](http://en.wikipedia.org/wiki/Hairpinning) | Customizable reverse DNS | Fix IP |
| --- | --- | --- | --- | --- | --- | --- |
| Cox | Multiple | Yes | No. Only for business class customer. | No | No | Yes, as a business class customer |
| Charter | Multiple | Yes | No. Only for business class customer. | No | No | Yes, as a business class customer |
| DSLExtreme | Multiple | Yes | Yes | No | No | Yes, extra charge. |

### UK
| Service provider | Box (modem/router) | uPnP available | Port 25 openable | [Hairpinning](http://en.wikipedia.org/wiki/Hairpinning) | Customizable reverse DNS | Fix IP |
| --- | --- | --- | --- | --- | --- | --- |
| BT Internet | - | - | Yes| - | - | No |

### Brazil
| Service provider | Box (modem/router) | uPnP available | Port 25 openable | [Hairpinning](http://en.wikipedia.org/wiki/Hairpinning) | Customizable reverse DNS | Fix IP |
| --- | --- | --- | --- | --- | --- | --- |
| Global Village Telecom | Multiple | Yes | No. Only for Fix IP| No | No | Yes, extra charge. |

### Ireland
| Service provider | Box (modem/router) | uPnP available | Port 25 openable | [Hairpinning](http://en.wikipedia.org/wiki/Hairpinning) | Customizable reverse DNS | Fix IP |
| --- | --- | --- | --- | --- | --- | --- |
| Whizzy Internet | Multiple | Yes | Yes| Yes | Yes | Yes |

### Canada
| Service provider | Box (modem/router) | uPnP available | Port 25 openable | [Hairpinning](http://en.wikipedia.org/wiki/Hairpinning) | Customizable reverse DNS | Fix IP |
| --- | --- | --- | --- | --- | --- | --- |
| Telus | Multiple | - | No. Extra charge | - | - | No. Extra charge |
| TekSavvy | Multiple | - | Yes | No | - | No. Extra charge |

### Sweden

| Service provider | Box (modem/router) | uPnP available | Port 25 openable | [Hairpinning](http://en.wikipedia.org/wiki/Hairpinning) | Customizable reverse DNS | Fix IP |
| --- | --- | --- | --- | --- | --- | --- |
| Telia | Multiple | Yes | No. Business only. | Yes | No. Business only. | No. Business only. |
| Bredbandsbolaget | Multiple | Yes | No. Business only. | Yes | No. Business only. | No. Business only. |

### Switzerland

Most of non business IP provided by ISP are blacklisted.

| Service provider | Box (modem/router) | uPnP available | Port 25 openable | [Hairpinning](http://en.wikipedia.org/wiki/Hairpinning) | Customizable reverse DNS | Fix IP |
| --- | --- | --- | --- | --- | --- | --- |
| Sunrise | Multiple | No | Yes | No | - | - |
| Swisscom | Multiple | No | Yes | No | - | - |
| VTX | Multiple | No | Yes | No | - | - |

If you want to add international ISPs information, please do consider [modifying this page](/write_documentation).
