Where or how does traceroute -a get the ASN? For example;
traceroute to cnet.com (64.30.228.118), 64 hops max, 52 byte packets
1 [AS198949] 192.168.1.1 (192.168.1.1) 2.931 ms 2.353 ms 2.399 ms
2 [AS0] 100.64.1.1 (100.64.1.1) 3.814 ms 2.975 ms 3.399 ms
3 [AS0] 100.64.0.3 (100.64.0.3) 3.443 ms 3.704 ms 3.563 ms
4 [AS20299] 186.176.192.57 (186.176.192.57) 5.403 ms 6.128 ms 4.100 ms
5 [AS20299] 186.32.0.217 (186.32.0.217) 4.345 ms 4.127 ms 2.770 ms
6 [AS23243] 190.106.192.237 (190.106.192.237) 42.834 ms
[AS23243] 190.106.192.240 (190.106.192.240) 42.314 ms
[AS23243] 190.106.192.237 (190.106.192.237) 43.004 ms
7 [AS0] 198.32.125.207 (198.32.125.207) 43.445 ms 45.915 ms 45.521 ms
8 [AS32787] po110.bs-b.sech-mia4.netarch.akamai.com (23.57.103.245) 53.836 ms 53.614 ms 54.332 ms
9 [AS32787] ae120.access-a.sech-mia4.netarch.akamai.com (23.57.103.249) 43.512 ms 46.006 ms 44.719 ms
10 [AS32787] 93.191.173.237 (93.191.173.237) 182.281 ms 125.422 ms 121.380 ms
11 [AS32787] a209-200-160-232.deploy.static.akamaitechnologies.com (209.200.160.232) 124.063 ms 124.289 ms 123.992 ms
This seems to happen almost instant, how does it get the ASN instantly?
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