diff --git a/src/network.js b/src/network.js
index f05be5960..df3faf13b 100644
--- a/src/network.js
+++ b/src/network.js
@@ -74,7 +74,7 @@ async function setBlocklist(blocklist, auditSource) {
     assert.strictEqual(typeof blocklist, 'string');
     assert.strictEqual(typeof auditSource, 'object');
 
-    const parsedIp = ipaddr.process(auditSource.ip);
+    const parsedIp = ipaddr.process(auditSource.ip); // will demangle IPv4 mapped IPv6
 
     let count = 0;
     for (const line of blocklist.split('\n')) {
diff --git a/src/tokens.js b/src/tokens.js
index fc7f30b33..755b5f925 100644
--- a/src/tokens.js
+++ b/src/tokens.js
@@ -209,7 +209,7 @@ function isIpAllowedSync(token, ip) {
     assert.strictEqual(typeof token, 'object');
     assert.strictEqual(typeof ip, 'string');
 
-    const parsedIp = ipaddr.process(ip);
+    const parsedIp = ipaddr.process(ip); // will demangle IPv4-mapped IPv6
 
     let allowedIpRanges = gParsedRangesCache.get(token.id); // returns undefined if not found
     if (!allowedIpRanges) {