When I run route print on my "normal" Windows 10 Pro machine, the "Persistent Routes" section lists 136 (!) Network addresses with a /32 mask, and "On-link" as the Gateway.
Many of the IP addresses seem to belong to Microsoft or Akamai, but there are also many others.
Where do all these routes come from? What is their purpose? Can I delete them all?
Here is a shortened version of my route print output:
===========================================================================
Interface List
12...48 0f cf 51 50 6b ......Intel(R) Ethernet Connection (2) I218-LM
1...........................Software Loopback Interface 1
17...00 15 5d 10 76 b6 ......Hyper-V Virtual Ethernet Adapter
32...00 15 5d 82 1b 63 ......Hyper-V Virtual Ethernet Adapter #2
===========================================================================
IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.88 25
127.0.0.0 255.0.0.0 On-link 127.0.0.1 331
127.0.0.1 255.255.255.255 On-link 127.0.0.1 331
[ ... etc. as usual ... ]
===========================================================================
Persistent Routes:
Network Address Netmask Gateway Address Metric
23.99.10.11 255.255.255.255 On-link 1
23.102.21.4 255.255.255.255 On-link 1
23.212.108.87 255.255.255.255 On-link 1
23.212.108.95 255.255.255.255 On-link 1
[ ... many more ...]
212.30.134.205 255.255.255.255 On-link 1
216.38.172.128 255.255.255.255 On-link 1
216.58.198.230 255.255.255.255 On-link 1
===========================================================================
IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination Gateway
12 281 ::/0 fe80::125a:f7ff:fe53:1d07
1 331 ::1/128 On-link
[ ... etc. ... ]
===========================================================================
Persistent Routes:
None
And in case it's useful (or just for the curious), here is an excerpt of the hostnames or whois "NetName" of these IP addresses:
cat win10-pers-routes.txt \
| while read ip; do h=$(host $ip) || h=$(whois $ip | grep -i NetName:); printf "%-15s %s\n" "$ip" "$h"; done
23.102.21.4 NetName: MSFT
23.212.108.87 87.108.212.23.in-addr.arpa domain name pointer a23-212-108-87.deploy.static.akamaitechnologies.com.
23.212.108.95 95.108.212.23.in-addr.arpa domain name pointer a23-212-108-95.deploy.static.akamaitechnologies.com.
...
37.252.163.4 netname: EUADNEXUS-AMS1-IB-1
...
64.4.6.100 NetName: MICROSOFT
...
65.39.117.230 NetName: PINPOINT-PNPT
65.52.100.7 7.100.52.65.in-addr.arpa domain name pointer df.telemetry.microsoft.com.
...
65.55.39.10 10.39.55.65.in-addr.arpa domain name pointer xnacreators.net.
...
65.55.252.190 NetName: MICROSOFT-1BLK
68.67.152.94 NetName: APPNE-NET1
68.67.153.87 87.153.67.68.in-addr.arpa domain name pointer lbip767081.nym2.adnexus.net.
...
68.67.152.172 NetName: APPNE-NET1
68.232.34.200 NetName: EDGECAST-NETBLK-04
82.199.80.143 netname: TC-MEDIAMIND
93.184.215.200 netname: EDGECAST-NETBLK-03
94.245.121.179 179.121.245.94.in-addr.arpa domain name pointer db3aqu.atdmt.com.
...
98.124.243.41 NetName: ENOM-BLOCK-2
111.221.29.177 netname: Microsoft
...
131.107.255.255 255.255.107.131.in-addr.arpa domain name pointer dns.msftncsi.com.
131.253.40.37 NetName: MICROSOFT
...
157.55.129.21 NetName: MSFT-GFS
...
168.61.24.141 NetName: MICROSOFT
168.62.187.13 NetName: MICROSOFT
168.63.108.233 NetName: MICROSOFT
173.252.88.160 NetName: FACEBOOK-INC
191.232.80.58
191.232.80.60
191.232.80.62
191.232.139.253
191.232.139.254
191.232.140.76
191.237.208.126
192.229.233.249 NetName: EDGECAST-NETBLK-08
207.46.101.29 NetName: MICROSOFT-GLOBAL-NET
...
212.30.134.204 netname: Akamai-in-MTS-node
216.38.172.128 NetName: WIRE-TV
216.58.198.230 230.198.58.216.in-addr.arpa domain name pointer lhr26s04-in-f6.1e100.net.
230.198.58.216.in-addr.arpa domain name pointer lhr26s04-in-f230.1e100.net.
230.198.58.216.in-addr.arpa domain name pointer lhr44s02-in-f6.1e100.net.
