--- title: "DNS FAQ" description: "Short answers about E2E DNS, reverse DNS for your IPs, nameservers, record types, wildcards, subdomains, email records, and how long changes take." content_type: "faq" product: "dns" platform: "MyAccount" url: "/myaccount/dns/faq/" --- # DNS FAQ ## How do I set reverse DNS for my server's IP? You add it yourself in MyAccount. First, make sure the name, such as `mail.example.com`, has an A record that points to the address. Then, under **Network**, click **DNS**, then **Add Reverse DNS**. On **Manage Reverse DNS**, click **Add Record**, choose the address under **IPv4 Address**, and enter the name under **Domain**. See [Set up reverse DNS](/myaccount/dns/how-to/set-up-reverse-dns/). If the record is refused, support sets reverse DNS on request. See [Custom Reverse DNS record already exist](/myaccount/dns/troubleshooting/dns/#custom-reverse-dns-record-already-exist). ## Do I need a support ticket to set a PTR record? You can add it yourself on **Manage Reverse DNS**; a PTR record is the reverse DNS record of an address. Support also sets it on request: send the address and the name it should return. See [Set up reverse DNS](/myaccount/dns/how-to/set-up-reverse-dns/). ## Why does my IP already have a reverse DNS name? Every E2E public IP has a default reverse name, set by E2E. A custom reverse DNS record you add replaces it. To see an address's current name, run `dig -x 203.0.113.10 +short` with your address. See [Set up reverse DNS](/myaccount/dns/how-to/set-up-reverse-dns/). ## Which IPs can I set reverse DNS for? The public IPs of your nodes, in every project, and the reserved IPs of the project you are working in. See [Set up reverse DNS](/myaccount/dns/how-to/set-up-reverse-dns/). ## Can I set reverse DNS for an IPv6 address? No. Custom reverse DNS is for IPv4 addresses. See [Set up reverse DNS](/myaccount/dns/how-to/set-up-reverse-dns/). ## Can one IP have two reverse DNS names? No. An address has one custom reverse DNS record, with one name. See [Set up reverse DNS](/myaccount/dns/how-to/set-up-reverse-dns/). ## Does the name need to be on E2E DNS for reverse DNS? No. The name must have an A record that points to the address, live on public DNS, and that A record can be on E2E DNS or at any other DNS provider. See [Set up reverse DNS](/myaccount/dns/how-to/set-up-reverse-dns/). ## Can I use `www.example.com` as a reverse DNS name? Yes. **Domain** in **Add Reverse Domain** takes any host name you control, such as `www.example.com` or `mail.example.com`. See [Set up reverse DNS](/myaccount/dns/how-to/set-up-reverse-dns/). ## Which DNS records does a mail server need? An MX record that names it, an SPF record in a TXT record, a DKIM record, and a DMARC record. A mail server you run yourself also needs reverse DNS on its IP set to its name, with that name's A record pointing back to the same IP. See [Set up email records](/myaccount/dns/how-to/set-up-email-records/). ## Which nameservers do I use for E2E DNS? `ns50.e2enetworks.net.in` and `ns51.e2enetworks.net.in`. Set both at your registrar in place of the domain's current nameservers. **Nameservers** on **Manage DNS** lists them. These two are the only nameservers E2E DNS offers; nameserver names under your own domain are not available. See [Point your domain to E2E nameservers](/myaccount/dns/how-to/point-your-domain-to-e2e-nameservers/). ## I pointed my domain to E2E's nameservers. Why are there no records? The domain also needs to be added in MyAccount. On **Manage DNS**, click **Add Domain**, then add its records. E2E's nameservers answer for the domain as soon as you add it. See [Add a domain](/myaccount/dns/how-to/add-a-domain/). If the domain is added and still does not answer, see [My domain does not resolve after I pointed it to E2E](/myaccount/dns/troubleshooting/dns/#my-domain-does-not-resolve-after-i-pointed-it-to-e2e). ## Can I use E2E DNS for a domain I bought somewhere else? Yes. Add the domain in MyAccount, and set E2E's nameservers at the registrar you bought it from. E2E does not register or sell domains. See [Get started with DNS](/myaccount/dns/get-started/). ## Can my domain point to a server outside E2E? Yes. **IPV4 Address** on **Add Domain**, and the address in an A record, can be any IPv4 address. See [Add a DNS record](/myaccount/dns/how-to/add-a-dns-record/). ## How long does a DNS change take? E2E's nameservers answer with a new record at once, and with an edit or a delete within about 10 seconds. Other DNS servers that looked the name up before keep the old answer until its TTL runs out. A nameserver change at your registrar can take up to 48 hours to reach every resolver. To see what E2E answers right now, run `dig @ns50.e2enetworks.net.in www.example.com A +short`. See [Troubleshooting DNS](/myaccount/dns/troubleshooting/dns/). ## What TTL should I use? 3600 seconds, which is one hour, or more, for records that rarely change. **Diagnostics** flags any record under 3600 seconds. Use a shorter TTL, such as 300 seconds, for a few hours before you move a record. See [Add a DNS record](/myaccount/dns/how-to/add-a-dns-record/#choose-the-ttl). ## Can I add a subdomain as its own domain? No. Add the registered domain, such as `example.com`, and add the subdomain as a record in it, such as an A record with **Host Name** `shop`. **Add Domain** refuses a subdomain with **A subdomain is not allowed when adding a domain**. See [Add a domain](/myaccount/dns/how-to/add-a-domain/). ## How do I point every subdomain to the same place? Add a CNAME record with **Host Name** `*` and **Point To** set to the name that has the address, such as `example.com`. Wildcards work as CNAME records only, not as A or AAAA records. See [Point every subdomain to one place](/myaccount/dns/how-to/add-a-dns-record/#point-every-subdomain-to-one-place). ## Which record types can I add? A, AAAA, CNAME, MX, TXT, and SRV; CAA records are not offered. The SOA and NS records come with the domain and stay as they are, with no edit or delete. See [Add a DNS record](/myaccount/dns/how-to/add-a-dns-record/). ## Can I add several MX records for one domain? Yes. Add one MX record for each mail server, each with its own **Priority**. Lower numbers are tried first. See [Set up email records](/myaccount/dns/how-to/set-up-email-records/#add-mx-records). ## Can I add several A records for one name? Yes, each with a different address. Adding the same address twice is refused. See [Add an A record](/myaccount/dns/how-to/add-a-dns-record/#add-an-a-record). ## Can a name have two CNAME records, or two SRV records? No. A host name can have one CNAME record, and a name can have one SRV record. A name with a CNAME record holds no record of any other type. See [Add a CNAME record](/myaccount/dns/how-to/add-a-dns-record/#add-a-cname-record). ## How do I move my subdomains from another DNS provider? Add one record for each subdomain on E2E, of the same type and value as at your old provider. Use a CNAME for each subdomain that points to a host name, and an A record for each that points to an address. Then change the nameservers. See [Move several subdomains from another provider](/myaccount/dns/how-to/add-a-dns-record/#move-several-subdomains-from-another-provider). ## Can I import a zone file? No. Add each record with **Add Record**. You can download your domain's zone file from its **Zone File** tab. See [Download a zone file](/myaccount/dns/how-to/download-a-zone-file/). ## Is DNS tied to a region? No. The same domains and records show whether you have Delhi or Chennai selected. Domains belong to a project, and each project lists only its own. See [Add a domain](/myaccount/dns/how-to/add-a-domain/). ## Why does my domain end in a dot? DNS writes complete names with a dot at the end, so `example.com` shows as `example.com.` in **Manage DNS** and in the records list. See [DNS](/myaccount/dns/). ## Why does Add Domain say my domain already exists? A domain can be added only once across E2E. It may already be in another of your projects, or in another account. See [Domain already exists when you add a domain](/myaccount/dns/troubleshooting/dns/#domain-already-exists-when-you-add-a-domain).