Managing regional failover via DNS queries

A system for managing failover in multi-regional network-based services, the system comprising:

• one or more computing devices associated with a processor and a memory for executing computer-executable instructions to implement a failover management service, wherein the failover management service is configured to:
• obtain a DNS query from a client device, wherein the DNS query is transmitted responsive to a characterized failure of a network-based resource in a designated region, wherein the DNS query corresponds to network-based resource failover information query, the network-based resource failover information query include a hash value representative of a concatenation of an identifier associated with the network-based resource and a salt associated with the client device;
• parse the network-based resource failover information query to identify the hash value;
• obtain network-based resource failover information associated with the identified hash value, wherein the network-based resource failover information includes a plurality of identified network-based resources in one or more alternative regions;
• and
• transmit a DNS query response responsive to the obtained DNS query from the client device, the DNS query response including at least a subset of the plurality of identified network-based resources.