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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesDo not change nameservers until the new zone matches the old one on every record that matters and you have chosen the DNSSEC path that fits your provider pair. Moving an active domain’s authoritative DNS is safe when four gates are cleared in order: inventory and import, a record-by-record diff, delegation and DNSSEC readiness, and a monitored cutover with a working rollback. Skipping the diff is the most common way a clean-looking migration breaks email, subdomains, or validation.
Before you start: identify the source, the destination, and DNSSEC state
The procedure depends on three facts you should write down before touching anything. Who hosts the zone today, who will host it next, and whether DNSSEC signing is currently enabled at either end.
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- Current provider and console access. You need the ability to export or list every record, including proxied, aliased, or routed records that a plain export may not show.
- Destination provider. Confirm it supports the record types you use, including any SRV, CAA, TLSA, or provider-specific alias types.
- Registrar or parent-zone access. You must be able to change the nameserver set and, if DNSSEC is involved, the DS record at the parent.
- DNSSEC status. Check whether the domain is signed today with a DS record at the parent. Run
dig +short DS example.comagainst a public resolver; an empty answer means no DS is published for the domain. Substitute your own domain.
Keep these facts with the migration notes. The DNSSEC path in Gate 3 cannot be chosen correctly without them.
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The goal of this gate is a complete, reviewed copy of the zone at the destination. A DNS zone migration copies configuration; it does not move your web server, mail service, or application. Each record must still point to the intended service after the copy.
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Get a complete record list from the current provider
Prefer a full zone export. AWS’s guidance for migrating an active domain begins with retrieving the current DNS configuration, and its zone-file import documentation describes importing a standard zone file into Route 53. If your current provider cannot export a full zone, list every record set through its console or API and confirm the count against what you expect. Manual recreation is reasonable for a small zone with a handful of records; for anything larger, a file-based import is easier to reproduce and to diff.
Import and inspect owner names and RDATA
Imports are where most silent errors enter. AWS’s zone-file import documentation states that a name without a trailing dot may be treated as relative, with the zone name appended. That affects the record owner name and, in some cases, the data itself. A CNAME target written as example.com without a final dot, imported as relative, becomes example.com.example.com. The record still loads, and it quietly points somewhere else.
Before you accept an import, scan these fields:
- Owner names for missing or doubled zone suffixes.
- RDATA for CNAME, MX, NS, SRV, and PTR targets, where a trailing dot changes meaning.
- TXT records that contain quotes, semicolons, or escaped characters, which some importers alter.
- Apex records (the zone name itself), which are easy to duplicate when a file already contains them.
Cloudflare’s import and export documentation, last updated April 16, 2026, also gives trailing-dot guidance for several record types and states a 256 KiB zone-file size limit and a rate limit of three API requests per minute. Those are Cloudflare-specific limits and may change, so confirm them on that page before you plan a large import: Cloudflare import and export.
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An import carries record text only. It can omit routing behavior, health checks, and alias records that a provider implements in its own way. Before the zone is considered complete, list every feature the current zone uses that the destination does not reproduce exactly:
- Weighted, latency-based, geolocation, or failover routing.
- Health checks that remove unhealthy endpoints from answers.
- Alias or flattened-CNAME records that resolve to a load balancer or CDN.
- Proxy or edge settings that change which IP addresses a name returns.
Any feature that has no destination equivalent is a gap to close before Gate 2, not after the cutover.
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Gate 2: Diff the old and new record sets before delegation changes
The diff is the core of this runbook. It compares what the old zone answers with what the new zone would answer, record by record, before the registrar or parent points anywhere new. AWS’s hosted-zone migration guidance for moving a zone between accounts says the outputs should be identical apart from NS and SOA values and intentional changes. Apply the same principle to any provider move.
What to compare
For every name and record type, compare these four fields:
- Name: the fully qualified owner name, with the zone suffix resolved.
- Type: A, AAAA, CNAME, MX, TXT, SRV, CAA, and so on.
- TTL: the value served, not only the value entered.
- Data: the answer string, including priorities, weights, ports, and trailing dots.
Acceptable exceptions
Two kinds of difference are expected and should be recorded as exceptions:
- The destination’s own NS and SOA records, which the new provider generates.
- Changes you planned on purpose, such as a new TTL or a retired host, each written down with a reason.
Every other mismatch is a stop condition. Investigate it and fix it or document why it is safe. Do not dismiss a difference because it looks minor. A single wrong MX priority can divert mail without any visible error for the website.
How to run the comparison
Query each authoritative server directly, so you see the zone’s own answers rather than cached ones. Substitute your own names:
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dig @ns1.old-provider.example www.example.com A +noall +answerreturns the answer from the old provider.dig @ns1.new-provider.example www.example.com A +noall +answerreturns the answer from the destination, which should be reachable before delegation changes.
Repeat for every name and type in your inventory, and compare TTL and data for each pair. For a large zone, script the queries, store both outputs, and review the differences rather than scanning by eye. Record the output as the sign-off artifact for Gate 2.
Gate 3: Delegation and DNSSEC readiness
Once the zones match, prepare the delegation change and decide how DNSSEC will be handled. This gate has two parts: the nameserver records and the trust chain.
Record the nameservers for both directions
Write down the exact destination nameservers you will enter at the registrar or parent zone. Confirm that the destination assigns them, because some providers generate a set specific to each zone. Also record the current nameservers exactly as they appear now. These are your rollback targets, and you should not rely on memory when you need them under pressure.
Determine whether DNSSEC is in play
If the domain is not signed, the delegation change is simpler and Gate 4 applies directly. If it is signed, do not copy one provider’s sequence onto another. AWS’s active-domain migration documentation states, in its own words, “You can’t have DNSSEC signing enabled across two providers at the same time.” That sentence describes AWS’s migration instructions. It is not a general rule about all DNS providers, and it does not rule out the multi-signer path described below.
Path A: the AWS-documented DNSSEC sequence
AWS’s described approach for a DNSSEC-signed domain removes the DS record at the parent before the migration and rebuilds the trust chain after the zone has moved. The order matters because a DS record that points to keys the new provider no longer serves causes validating resolvers to return SERVFAIL for the domain. Follow the sequence in the official guidance step by step:
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- Disable DNSSEC signing at the current provider, following its instructions.
- Remove the DS record at the registrar or parent zone, and wait for that removal to propagate.
- Complete the nameserver change and the record migration described in Gates 1 through 2.
- Enable DNSSEC at the destination and publish the new DS record at the parent.
Full detail is in the AWS active-domain migration guidance: AWS active-domain migration, and the zone-level steps are in AWS hosted-zone migration.
While the DS record is absent, the domain is temporarily unsigned from the parent’s point of view. That is a security trade-off you should accept knowingly and time carefully.
Path B: the Cloudflare advanced multi-signer migration
Cloudflare documents a multi-signer approach as an advanced procedure. It keeps the domain signed through the transition by having both providers’ keys present, but it applies only when the former provider allows apex DNSKEY records and returns them in answers. If your current provider does not do that, Path B is not available, and you should use Path A or consult the provider. Key exchange, DS sequencing, and nameserver timing are all specific to Cloudflare’s instructions, so follow the Cloudflare tutorial rather than reconstructing it: Cloudflare DNSSEC migration.
Choose the transfer method for each situation
The table compares the methods you may encounter. Only the first two are about moving a zone once. The last two are about keeping providers in sync.
| Choice | Best for | Check before proceeding |
|---|---|---|
| Manually recreate records | Small, simple zones | Completeness, routing features, email and validation records |
| Export and import a zone file | Larger zones or a reproducible transfer | File format, trailing dots, unsupported or provider-specific features, post-import diff |
| AXFR and IXFR zone transfer | Supported multi-provider synchronization | Transfer capability at both providers, access controls, and synchronization behavior. AXFR transfers the full zone; IXFR transfers changes since the previous transfer. Cloudflare’s zone-transfer documentation covers its configuration: Cloudflare zone transfers |
| Standard DNSSEC transition (Path A) | A provider migration that follows AWS’s published path | DS removal before the move and new trust-chain setup after it |
| Multi-signer DNSSEC (Path B) | Advanced migration when both providers support the required key behavior | Apex DNSKEY support, key exchange, DS and nameserver sequencing, and the provider’s own instructions |
Gate 4: Cutover and observe
Cutover is a change to the delegation, followed by monitoring. The earlier gates reduce the risk, but resolvers still cache the old delegation for a period you do not control, so the work here is preparation and watching.
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Lower the NS TTL in advance
Lower the TTL on the existing NS records before the change, so that resolvers refresh the delegation sooner after you switch. AWS’s active-domain migration guidance recommends a temporary NS TTL in the range of 60 to 900 seconds, which it gives as 15 minutes as an example. Lower it well ahead of the change, and wait at least the previous TTL before you switch, so that the lower value is actually in caches. The typical NS TTL in AWS’s example is 172800 seconds (two days). That is provider guidance, not a universal constant, and your registrar or parent may apply its own value.
Change the delegation and monitor
- Confirm the diff sign-off from Gate 2 and the DNSSEC step from Gate 3 are complete.
- Update the nameservers at the registrar or parent zone to the destination set you recorded.
- Query the parent for the new delegation:
dig +short NS example.com, using a public resolver. Repeat over the following hours, because different resolvers switch at different times. - Watch real services, not only DNS answers. Load the website, exercise the application login path, and send a test message to and from the domain.
- Check the logs at the old provider for queries that still arrive. Declining query volume confirms that resolvers are moving over.
Roll back if traffic degrades
If the website, application, or mail flow degrades, restore the previous nameservers you recorded at Gate 3 and investigate before trying again. Rollback is only possible while the old zone still exists and still answers correctly, which is why it must not be deleted early.
After the transition is healthy
AWS’s hosted-zone migration guidance says not to delete the old zone for at least 48 hours after the nameserver update. Keep it intact through that window and longer if caches are still pointing to it. Once the transition is stable, restore a typical NS TTL so that the delegation is not refreshed unnecessarily often. Only then retire the old zone and the old records.
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Limits of this guidance
- The AWS active-domain procedure covers migration to Route 53. Destination-provider features and exact controls differ elsewhere, so use the destination’s own documentation for its console labels and settings.
- The AWS account-migration guidance is for zones moving between AWS accounts. Its record-comparison principle applies to any move, but its account-specific commands should not be used as generic instructions.
- DNSSEC handling depends on the specific provider pair and on what your registrar allows. Identify both before choosing Path A or Path B.
- Cloudflare’s limits and TTL behavior are volatile and provider-specific. Check the current documentation before a large import or a multi-signer migration.
- No independent measured figures on DNS migration success, downtime, or defect rates were established for this guidance. The TTL values above are provider recommendations, not measured outcomes.
The sequence in this runbook follows the vendor documentation linked above. Where a provider’s instructions differ, follow the provider for its own steps and keep the four gates as the checkpoints you verify.
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