diff --git a/pages/01.administrate/07.specific_use_cases/02.isp/isp.md b/pages/01.administrate/07.specific_use_cases/02.isp/isp.md
index 37079019..c3e062b0 100644
--- a/pages/01.administrate/07.specific_use_cases/02.isp/isp.md
+++ b/pages/01.administrate/07.specific_use_cases/02.isp/isp.md
@@ -86,8 +86,10 @@ 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 |
 | --- | --- | --- | --- | --- | --- | --- |
-| DNA | Multiple | Yes | No. Regulations in Finland prohibit the use of Port 25 for consumers. | Yes | No | No. Only for business. |
-| Elisa | Multiple | Yes | No. Regulations in Finland prohibit the use of Port 25 for consumers. | Yes | Not available for consumers | No. Only for Business. |
-| Telia | Multiple | Yes | No. Regulations in Finland prohibit the use of Port 25 for consumers. | Yes | Not available for consumers | No. Only for Business. |
+| DNA | Multiple | Yes | No [^fi-port25] | Yes | No | No. Only for business. |
+| Elisa | Multiple | Yes | No [^fi-port25] | Yes | Not available for consumers | No. Only for Business. |
+| Telia | Multiple | Yes | No [^fi-port25] | Yes | Not available for consumers | No. Only for Business. |
+
+[^fi-port25]: Regulations in Finland prohibit the use of Port 25 for consumers.
 
 If you want to add international ISPs information, please do consider [modifying this page](/write_documentation).