Error 404 not found when Dial

Hello,
I have registered the SIP successfully. No issues in registering the users.
But when I am dialing I am getting 404 Not found error.

sip.conf

[general]
context=default
context=public
allowguest=no
srvlookup=yes
udpbindaddr=0.0.0.0
tcpenable=no
transport=udp
;nat=force_rport
nat=force_rport,comedia
qualify=yes
canreinvite=no
disallow=all
alwaysauthreject = yes
deny=0.0.0.0/0.0.0.0
permit=xx.xx.xx.xx/xx.xx.xx.xx


[6001]
type=friend
;context=from-internal
context=incoming
host=dynamic
secret=xxxx
disallow=all
allow=ulaw

[6002]
type=friend
context=incoming
secret=1234
disallow=all
allow=ulaw,alaw
host=dynamic

[Pokhraj]
type=friend
context=incoming
disallow=all
allow=ulaw,alaw
secret=xxxxx
host=dynamic

extension.conf

[Pokhraj]
exten => 100,1,Dial(SIP/Pokhraj)
exten => 100,n,Hangup()
[6001]
exten => 6001,1,Dial(SIP/6001)
exten => 6001,n,Hangup()

Please advice on this…

You have configured the friends to go to the “incoming” context. Your extensions.conf output has no “incoming” context. It has “6001” and “Pokhraj”.