I accidentally logged phone calls to military bases

A security researcher discovered they could hijack e164.arpa DNS zones—infrastructure domains that control phone call routing for entire territories—due to expired nameservers, and inadvertently logged hundreds of thousands of phone calls to military bases in the process. The e164.arpa system, designed in the early 2000s to route calls over VoIP instead of traditional phone networks, is largely obsolete and poorly maintained, making these critical infrastructure domains vulnerable to takeover. The researcher reported their findings after realizing the security implications of their discovery.