Of all the foundational elements of the internet, the Domain Name System (DNS) is among the most critical. It enables users to locate and connect to online resources—from corporate websites to cloud services—and underpins the modern digital experience. Because of this importance, DNS is also a frequent target for attackers seeking to disrupt availability or compromise services.
UltraDNS not only delivers resilient and secure DNS resolution, it also provides visibility into how the DNS landscape is evolving. Each month we analyze authoritative query and attack data across the UltraDNS network to surface trends, highlight shifts in traffic patterns, and share insights that can help organizations understand and anticipate DNS-related risks.
This report summarizes those findings and provides a snapshot of the current DNS environment as observed across UltraDNS.
June 2025 saw a modest pullback in overall DNS traffic on DigiCert’s UltraDNS platform.
- Total Authoritative Queries: 4.1 trillion (5.53% decrease compared to May 2025’s 4.34 trillion)
- Percentage of queries using IPv6: 26.02% (2.48% decrease compared to May 2025’s 26.68%)
- Percentage of queries for AAAA (IPv6) records: 17.44% (3.75% decrease compared to May 2025’s 18.12%)
- Percentage of NOERR query answers: 80.48% (a 0.29% increase compared to May 2025’s 80.25%)
- Percentage of NXDOMAIN query answers: 18.98% (a 2.42% decrease compared to May 2025’s 19.45%)
- Number of DDoS attacks against UltraDNS: 7 (a 61.11% decrease compared to May 2025’s 18)
