> For the complete documentation index, see [llms.txt](https://docs.dnscontrol.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dnscontrol.org/language-reference/record-modifiers.md).

# Record Modifiers

- [TTL](https://docs.dnscontrol.org/language-reference/record-modifiers/ttl.md)
- [Service Provider specific](https://docs.dnscontrol.org/language-reference/record-modifiers/service-provider-specific.md)
- [Amazon Route 53](https://docs.dnscontrol.org/language-reference/record-modifiers/service-provider-specific/amazon-route-53.md)
- [R53\_ZONE](https://docs.dnscontrol.org/language-reference/record-modifiers/service-provider-specific/amazon-route-53/r53_zone.md)
- [R53\_EVALUATE\_TARGET\_HEALTH](https://docs.dnscontrol.org/language-reference/record-modifiers/service-provider-specific/amazon-route-53/r53_evaluate_target_health.md)
- [Hurricane Electric DNS](https://docs.dnscontrol.org/language-reference/record-modifiers/service-provider-specific/hurricane-electric-dns.md)
- [HEDNS\_DYNAMIC\_ON](https://docs.dnscontrol.org/language-reference/record-modifiers/service-provider-specific/hurricane-electric-dns/hedns_dynamic_on.md)
- [HEDNS\_DYNAMIC\_OFF](https://docs.dnscontrol.org/language-reference/record-modifiers/service-provider-specific/hurricane-electric-dns/hedns_dynamic_off.md)
- [HEDNS\_DDNS\_KEY](https://docs.dnscontrol.org/language-reference/record-modifiers/service-provider-specific/hurricane-electric-dns/hedns_ddns_key.md)