Des tests que j'ai fait, ne répondent pas Twitter et PayPal depuis les DNS Google, Level3, FDN, Oxid.
Répondent sur mes DNS qui utilisent OpenNIC et pour les domaines ICANN ça tourne entre OpenNIC, Level3, DNS.watch et les root.
Pour ceux qui veulent, mes résultats DNS:
;; QUESTION SECTION:
;twitter.com. IN A
;; ANSWER SECTION:
twitter.com. 992 IN A 104.244.42.129
twitter.com. 992 IN A 104.244.42.1
;; AUTHORITY SECTION:
twitter.com. 327 IN NS ns1.p34.dynect.net.
twitter.com. 327 IN NS ns2.p34.dynect.net.
twitter.com. 327 IN NS ns3.p34.dynect.net.
twitter.com. 327 IN NS ns4.p34.dynect.net.
;; ADDITIONAL SECTION:
ns1.p34.dynect.net. 257 IN A 208.78.70.34
ns2.p34.dynect.net. 5602 IN A 204.13.250.34
ns3.p34.dynect.net. 257 IN A 208.78.71.34
ns4.p34.dynect.net. 5602 IN A 204.13.251.34
;; Query time: 15 msec
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;paypal.com. IN A
;; ANSWER SECTION:
paypal.com. 861 IN A 64.4.250.23
paypal.com. 861 IN A 64.4.250.24
;; AUTHORITY SECTION:
com. 4188 IN NS i.gtld-servers.net.
com. 4188 IN NS d.gtld-servers.net.
com. 4188 IN NS b.gtld-servers.net.
com. 4188 IN NS f.gtld-servers.net.
com. 4188 IN NS k.gtld-servers.net.
com. 4188 IN NS c.gtld-servers.net.
com. 4188 IN NS g.gtld-servers.net.
com. 4188 IN NS l.gtld-servers.net.
com. 4188 IN NS j.gtld-servers.net.
com. 4188 IN NS e.gtld-servers.net.
com. 4188 IN NS a.gtld-servers.net.
com. 4188 IN NS m.gtld-servers.net.
com. 4188 IN NS h.gtld-servers.net.
;; ADDITIONAL SECTION:
a.gtld-servers.net. 2425 IN A 192.5.6.30
a.gtld-servers.net. 2425 IN AAAA 2001:503:a83e::2:30
b.gtld-servers.net. 4574 IN A 192.33.14.30
b.gtld-servers.net. 4574 IN AAAA 2001:503:231d::2:30
c.gtld-servers.net. 4119 IN A 192.26.92.30
d.gtld-servers.net. 1343 IN A 192.31.80.30
e.gtld-servers.net. 1515 IN A 192.12.94.30
f.gtld-servers.net. 2528 IN A 192.35.51.30
g.gtld-servers.net. 3906 IN A 192.42.93.30
h.gtld-servers.net. 4979 IN A 192.54.112.30
i.gtld-servers.net. 3494 IN A 192.43.172.30
j.gtld-servers.net. 3884 IN A 192.48.79.30
k.gtld-servers.net. 739 IN A 192.52.178.30
l.gtld-servers.net. 739 IN A 192.41.162.30
m.gtld-servers.net. 828 IN A 192.55.83.30
;; Query time: 16 msec