DNS lookup summary for github.io
This page shows the DNS records for github.io, queried live from public DNS servers. DNS records are the data that connect the domain name to IP addresses, mail servers and other services.
Below you can review the A, AAAA, MX, TXT, NS and CNAME records for github.io, change the DNS server used for the query and run a new lookup for any other domain.
What are DNS records?
DNS (Domain Name System) records are entries stored in a domain's authoritative zone. They translate a human-readable name into the technical details computers need to reach the right server or service.
Common record types include A and AAAA (IPv4 and IPv6 addresses), MX (mail servers), TXT (verification and email policies such as SPF, DKIM and DMARC), NS (name servers) and CNAME (aliases).
How to read the DNS records of github.io
The A and AAAA records reveal which IP addresses github.io currently points to. The MX records list the servers that receive email for github.io, while TXT records hold verification and email-authentication policies.
Each record also has a TTL (time to live) that indicates how long it can be cached. Higher TTLs mean changes take longer to propagate across the internet.
Use cases
- Verify which IP address github.io resolves to right now.
- Troubleshoot email delivery for github.io by inspecting MX and TXT records.
- Confirm DNS propagation for github.io after changing providers.
- Audit SPF, DKIM and DMARC configuration for github.io.
Frequently asked questions
Which IP address does github.io point to?
The A record (IPv4) and AAAA record (IPv6) shown above indicate the IP addresses github.io currently resolves to.
What are the A records for github.io?
The A records on this page list the IPv4 addresses github.io resolves to right now, queried live from public DNS servers.
How do I run a DNS lookup for github.io?
Open this page to query github.io automatically, or enter any domain in the search field. Results include A, AAAA, MX, TXT, NS and CNAME records.
What DNS records does github.io have?
This page lists the public DNS records for github.io, including A, AAAA, MX, TXT, NS and CNAME records when they exist in the domain's zone.
How do I check the mail servers for github.io?
Look at the MX records on this page. They list, in priority order, the servers responsible for receiving email for github.io.
Why are the DNS records for github.io different from what I expected?
DNS changes take time to propagate because of TTL caching, and results can vary by DNS server. Try a different DNS server or run the lookup again after propagation completes.
Is the DNS lookup for github.io free?
Yes. The XploreNetHub DNS Lookup is completely free, requires no sign-up and runs directly in your browser.
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- DNS and SSL Checklist — Steps and verification table before pointing a domain.