diff --git a/content/congress_hamburg.md b/content/congress_hamburg.md
index b81f047a89ffd890c50eb083ec236281f71459e1..15e3b4dced31cfdd8f28ac1c53b812c111b84426 100644
--- a/content/congress_hamburg.md
+++ b/content/congress_hamburg.md
@@ -24,7 +24,7 @@ For important topics and requests our ticket system is the preferred contact poi
 |---------------|--------------|
 |Ticketsystem:  | {{< spamspan 38c3-logistik cccv.de >}}|
 |Rocket.Chat:   | #logistik    |
-|On-Site Phone: |  |
+|On-Site Phone: | +49 30 75436380 |
 |DECT:          | 1010         |
 
 ## Shipping to Congress