Jan 11 16:58:01 NOTICE[3987]: chan_sip.c:5387 sip_reg_timeout: -- Registration for '1000@serserv.com' timed out, trying again (Attempt #20000)

Jan 11 16:58:01 WARNING[3987]: chan_sip.c:1989 create_addr: No such host: serserv.com

Jan 11 16:58:01 WARNING[3987]: chan_sip.c:5470 transmit_register: Probably a DNS error for registration to 1000@serserv.com, trying REGISTER again (after 20 sec onds)

Looked on google and nothing helps with navigating me to the correct answer. Any suggestion?