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Network · ASN lookup

AS33491: Comcast

AS33491 belongs to Comcast and is registered in the United States.

Facts about AS33491

Dataset read 2026-11-01 What the public iptoasn.com dataset held for AS33491 on the day this copy was read. It is refreshed about once a month. IPv4 only

AS number

AS33491

Registered descriptionCOMCAST-33491

USUnited States
IPv4 addresses The addresses in all 305 of its ranges. The share is that total over the 4,294,967,296 addresses of the whole IPv4 space.
3,142,144
0.073% of the whole IPv4 space
IPv4 ranges
305
Kind of network
Home and business broadband
Hosting network Yes only when the AS number is on our list of hosting and cloud networks. Not on our list says nothing about what kind of network it is.
Not on our list

The 15 largest ranges below hold 42.8% of its addresses Each segment is one of the ranges listed below, drawn at its share of all 3,142,144 addresses of AS33491. The empty part is every other range. 1,343,488 of 3,142,144

Country: United States (US), as the registry holds it. Where the network is registered, which is not always where its customers are. Open AS33491 in the ASN lookup

Largest IPv4 ranges of AS33491

Each bar is the range's address count against the largest one. A prefix such as /12 shows when a range is exactly one aligned CIDR block.

The 15 largest of 305, biggest first

Largest IPv4 ranges of AS33491, with the number of addresses in each
#First address to last addressSize against the largest rangeAddresses
0124.12.0.0 to 24.15.255.255/14262,144
0268.38.0.0 to 68.39.255.255/15131,072
0368.44.0.0 to 68.45.255.255/15131,072
0468.50.0.0 to 68.51.127.25598,304
0524.1.0.0 to 24.1.255.255/1665,536
0667.175.0.0 to 67.175.255.255/1665,536
0767.184.0.0 to 67.184.255.255/1665,536
0871.194.0.0 to 71.194.255.255/1665,536
0971.201.0.0 to 71.201.255.255/1665,536
1071.239.0.0 to 71.239.255.255/1665,536
1176.16.0.0 to 76.16.255.255/1665,536
1276.136.0.0 to 76.136.255.255/1665,536
1376.141.0.0 to 76.141.255.255/1665,536
1476.150.0.0 to 76.150.255.255/1665,536
1576.157.0.0 to 76.157.255.255/1665,536

Using this network with a proxy

It targets that one network, and it is not applied on geo-forced pools. If no exit on the network is available, the request fails instead of falling back to another network. We do not publish which networks are available at a given time.

A request names it with the asn option, written AS33491 or 33491. Every pool takes it: Essential and Premium Residential, and Mobile.

Essential and Premium