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Code snippet below: NSString *host = @"time.google.com"; CFHostRef cfHostRef = CFHostCreateWithName(nil, (__bridge CFStringRef) host); Boolean didLookup = CFHostStartInfoResolution(cfHostRef, kCFHostAddresses, nil); NSLog(@"didLookup=%d", didLookup); CFArrayRef addresses = CFHostGetAddressing(cfHostRef, &didLookup); struct sockaddr *remoteAddr; long count = CFArrayGetCount(addresses); NSLog(@"count=%ld (this should include both ip4 and ip6)", count); for(int i = 0; i < count; i++) { CFDataRef saData = (CFDataRef)CFArrayGetValueAtIndex(addresses, i); remoteAddr = (struct sockaddr*)CFDataGetBytePtr(saData); NSLog(@"family=%d (AF_INET=%d, AF_INET6=%d)",remoteAddr->sa_family, AF_INET, AF_INET6); NSString* addrPretty = nil; switch (remoteAddr->sa_family) { case AF_INET: { char dest[INET_ADDRSTRLEN]; struct sockaddr_in *ip4 = (struct sockaddr_in *) remoteAddr; addrPretty = [NSString stringWithFormat: @"%s", inet_ntop(AF_INET, &ip4->sin_addr, dest, INET_ADDRSTRLEN)]; break; } case AF_INET6: { char dest[INET6_ADDRSTRLEN]; struct sockaddr_in6 *ip6 = (struct sockaddr_in6 *) remoteAddr; addrPretty = [NSString stringWithFormat: @"%s", inet_ntop(AF_INET6, &ip6->sin6_addr, dest, INET6_ADDRSTRLEN)]; break; } default: break; } NSLog(@"addrPretty=%@", addrPretty); } As far as I understand this should print out both IPv4 and IPv6 addresses, but it only does the former. This is as tested on both a simulator and a real device, on different networks. Note that I can traceroute6 -I time.google.com and see IPv6 addresses just fine, and I can also do set q=AAAA in the nslookup prompt and get the expected addresses when performing the query for time.google.com in the same prompt.