999 callers in the Biggleswade area may have trouble getting through as BT has reported a partial loss of the service.
Bedfordshire Fire and Rescue warned potential callers that BT was experiencing the partial loss for calls made from landlines.
Calls made via mobile phones are still being connected as usual.
A BT spokesperson said: “A small number of customers served by our Luton Exchange may be experiencing problems with landline calls due to a hardware fault.
"Our engineers are working hard to restore full services as quickly as possible.
"Broadband and mobile services are not affected. We’re sorry for any inconvenience.”