ya.com por telefonica sin acceso a algunas webs

Creo que el problema está en el servidor de nombres de ese dominio (secureserver.net):

C:>ping godaddy.com
Host desconocido godaddy.com.

C:>nslookup
Servidor predeterminado: nsampen1.lo.nuria.telefonica-data.net
Address: 213.0.184.85

> set type=ANY
> godaddy.com
Servidor: nsampen1.lo.nuria.telefonica-data.net
Address: 213.0.184.85

DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
*** La petición a nsampen1.lo.nuria.telefonica-data.net a caducado

> lserver a.gtld-servers.net
Servidor predeterminado: a.gtld-servers.net
Address: 192.5.6.30

> godaddy.com
Servidor: a.gtld-servers.net
Address: 192.5.6.30

Respuesta no autoritativa:
godaddy.com nameserver = cns1.secureserver.net
godaddy.com nameserver = cns2.secureserver.net

godaddy.com nameserver = cns1.secureserver.net
godaddy.com nameserver = cns2.secureserver.net
cns1.secureserver.net internet address = 64.202.167.31
cns2.secureserver.net internet address = 64.202.167.32

> lserver cns1.secureserver.net
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
*** No se puede encontrar una direcci¢n para el servidor cns1.secureserver.net: Timed out

> lserver 64.202.167.31
DNS request timed out.
timeout was 2 seconds.
Servidor predeterminado: [64.202.167.31]
Address: 64.202.167.31

> godaddy.com
Servidor: [64.202.167.31]
Address: 64.202.167.31

godaddy.com
primary name server = cns1.secureserver.net
responsible mail addr = dns.jomax.net
serial = 2004122100
refresh = 3600 (1 hour)
retry = 600 (10 mins)
expire = 259200 (3 days)
default TTL = 3600 (1 hour)
godaddy.com text =

"v=spf1 a:69.64.33.132 a:66.98.160.100 a:64.202.160.108 ip4:64.202.167.0
/24 ip4:64.202.166.0/24 ip4:64.202.165.0/24 ip4:64.202.163.0/24 ip4:64.202.189.0
/24 ~all"
godaddy.com MX preference = 10, mail exchanger = mailstore1.secureserver.net

godaddy.com MX preference = 0, mail exchanger = smtp.secureserver.net
godaddy.com internet address = 64.202.188.201
godaddy.com nameserver = cns1.secureserver.net
godaddy.com nameserver = cns2.secureserver.net
smtp.secureserver.net internet address = 64.202.166.12
mailstore1.secureserver.net internet address = 64.202.166.11
cns1.secureserver.net internet address = 64.202.167.31
cns2.secureserver.net internet address = 64.202.167.32

> www.secureserver.net
Servidor: [64.202.168.31]
Address: 64.202.168.31

DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
*** La petición a [64.202.168.31] a caducado

> secureserver.net
Servidor: [64.202.168.31]
Address: 64.202.168.31

DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
*** La petición a [64.202.168.31] a caducado

Si te urge, coloca una entrada estática en tu fichero hosts:

64.202.188.201 www.godaddy.com

Y si pruebas a cambiar el servidor DNS??