Country codes beginning with 25 are assigned to several African countries. The full code is required to identify the specific country. Here are some examples:
+250: Rwanda
+251: Ethiopia
+252: Somalia
+253: Djibouti
+254: Kenya
+255: Tanzania
+256: Uganda
+257: Burundi
+258: Mozambique
+259: Reserved
If you have the complete number, it can help determine the exact location.