I'm using Vodafone as my ISP and I'm seeing what appears to be DNS filtering/interference.
The IPv6 resolver works perfectly:
$ dig -t AAAA google.com @2001:4860:4860::8888 ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58402 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 512 ;; QUESTION SECTION: ;google.com. IN AAAA ;; ANSWER SECTION: google.com.177 IN AAAA 2a00:1450:4003:810::200e ;; Query time: 20 msec ;; SERVER: 2001:4860:4860::8888#53(2001:4860:4860::8888) (UDP) ;; WHEN: Wed Sep 02 21:22:41 CEST 2026 ;; MSG SIZE rcvd: 67 However, querying Google's DNS server over IPv4:
$ dig -t AAAA google.com @8.8.8.8 ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1220 ;; QUESTION SECTION: ;google.com. IN AAAA ;; Query time: 16 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) (UDP) ;; WHEN: Wed Sep 02 21:26:53 CEST 2026 ;; MSG SIZE rcvd: 67 But with trace, the AAAA register appears:
$ dig -t AAAA google.com @8.8.8.8 +trace ;; global options: +cmd .6789INNSl.root-servers.net. .6789INNSc.root-servers.net. .6789INNSa.root-servers.net. .6789INNSi.root-servers.net. .6789INNSj.root-servers.net. .6789INNSk.root-servers.net. .6789INNSg.root-servers.net. .6789INNSe.root-servers.net. .6789INNSf.root-servers.net. .6789INNSd.root-servers.net. .6789INNSb.root-servers.net. .6789INNSm.root-servers.net. .6789INNSh.root-servers.net. .7122INRRSIGNS 8 0 518400 20260915050000 20260902040000 57780 . LWJGyncex/6vaD/0AWFuPl2Ng7NFGVERJ7xgwJ/P75OBT8suIB0TnK5E 7RowXHInpGA2UcDK/AxCOKUXsUtSd1OeUnQBZLE4m0YWKjlCQ6+F0UrG oMWTGZuJMSrj9WxolONFlWCfm2cnGOF6ZNirmYzc7L5ZqNd6zDFtJE/E jcBvUdvFsj90Yq7ac59GrXMAP9lzY2E95YNI6atc0lwcN+IHXIzhzQWx HR9Df8SjP64V+4vujb61r2m8V0zxUYom4Fx9M572zuS3o0G9mVfqFNaW KLGQGiWA1fvD/Rd5YcBhCW2d+f5iWb1lNJ8i5PpCp88zk25Zsku8J4pd PuBarg== ;; Received 693 bytes from 8.8.8.8#53(8.8.8.8) in 4 ms com.172800INNSg.gtld-servers.net. com.172800INNSa.gtld-servers.net. com.172800INNSc.gtld-servers.net. com.172800INNSe.gtld-servers.net. com.172800INNSb.gtld-servers.net. com.172800INNSk.gtld-servers.net. com.172800INNSf.gtld-servers.net. com.172800INNSm.gtld-servers.net. com.172800INNSj.gtld-servers.net. com.172800INNSd.gtld-servers.net. com.172800INNSh.gtld-servers.net. com.172800INNSi.gtld-servers.net. com.172800INNSl.gtld-servers.net. com.86400INDS19718 13 2 8ACBB0CD28F41250A80A491389424D341522D946B0DA0C0291F2D3D7 71D7805A com.86400INRRSIGDS 8 1 86400 20260915170000 20260902160000 57780 . sR14KQ7PJ5pG/gi0HseqXQGU1m6cNAQ58TsDeo3Ua2J5r5GAU4feKjOg 7VsdMFLHyoP8hZRg4+FXTPb0qOt1tHUqAtReiZ7E7OTeFAxPtm4nb9V/ aE3AvGCxR+sUC8OWa1R7nswb/+QlTwiu8NyywxyKA+XvHDHcflANfqTC qLlYsutoOmGtB9KGYCq25aauhy1/FpqLVPkKJ7ERWmIjyLR4RXdnbcvp QmCxFkJMVMNqVeHTaGH9PgDzn1zeCwchUru+yPQn/JUL4+SPSpUirJcw 1kcIx8ROliCCeSwmrpcMYZQTpvl/k08eZK5+IYsmI9yJdl5QKhpjs3Fn J8VZow== ;; Received 1198 bytes from 2001:500:2f::f#53(f.root-servers.net) in 12 ms google.com.172800INNSns2.google.com. google.com.172800INNSns1.google.com. google.com.172800INNSns3.google.com. google.com.172800INNSns4.google.com. CK0POJMG874LJREF7EFN8430QVIT8BSM.com. 900 IN NSEC3 1 1 0 - CK0Q35HRS4H76G6CHNB9414CJN6S5UPL NS SOA RRSIG DNSKEY NSEC3PARAM CK0POJMG874LJREF7EFN8430QVIT8BSM.com. 900 IN RRSIG NSEC3 13 2 900 20260907002613 20260830231613 41446 com. sg9EOEcu6SU4/ORJtbNXqgcb5RzZqJQmdWxcqkGAZOQ3FLF/Sx7pE1hn Yv/Skldv5Z0zZJ0G4tqCovTBylPKdQ== S84BOR4DK28HNHPLC218O483VOOOD5D8.com. 900 IN NSEC3 1 1 0 - S84BR9CIB2A20L3ETR1M2415ENPP99L8 NS DS RRSIG S84BOR4DK28HNHPLC218O483VOOOD5D8.com. 900 IN RRSIG NSEC3 13 2 900 20260908012131 20260901001131 41446 com. xUh2VrKslVK6kTUnET647tTAQSz+xF0jbkDAik9EXrcXeC+SiAxOrNEC xMd9ksojMnBs6+Ursf+99GmTxlpnjg== ;; Received 644 bytes from 2001:503:d2d::30#53(k.gtld-servers.net) in 44 ms google.com.38332INNSns4.google.com. google.com.38332INNSns2.google.com. google.com.38332INNSns1.google.com. google.com.38332INNSns3.google.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 139 bytes from 216.239.34.10#53(ns2.google.com) in 8 ms ;; communications error to 216.239.34.10#53: timed out google.com.38327INNSns2.google.com. google.com.38327INNSns3.google.com. google.com.38327INNSns1.google.com. google.com.38327INNSns4.google.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 139 bytes from 216.239.34.10#53(ns2.google.com) in 4 ms google.com.300INAAAA2a00:1450:400c:c02::65 google.com.300INAAAA2a00:1450:400c:c02::64 google.com.300INAAAA2a00:1450:400c:c02::8a google.com.300INAAAA2a00:1450:400c:c02::8b ;; Received 151 bytes from 2001:4860:4802:38::a#53(ns4.google.com) in 36 ms With other DNS servers, like 1.1.1.1 or 9.9.9.9 equal response, Answer: 0.
Is there a way to confirm it from the client side in any other way?
Thanks,
Source: r/ipv6 · by /u/rfmoz