AS33655 — CMCS
AS33655 announces 40 IPv4 prefixes covering 89,600 addresses and 13 IPv6 prefixes.
About this network
The AS handle CMCS is held by Comcast Cable Communications, LLC.
What it's used for
- The address space carries residential cable internet services, evidenced by reverse DNS entries such as c-69-242-144-0.hsd1.mo.comcast.net and c-69-254-247-254.hsd1.ks.comcast.net.
- With 89,600 IPv4 addresses announced across 40 prefixes and only 4 observed neighbours, the high address-to-neighbour ratio indicates a large-scale access or eyeball network rather than a transit provider.
Notable
- Registrants consistently identify as Comcast Cable Communications, LLC or its predecessors, including "Comcast Cable Communications, Inc" and "Comcast Cable Communications, IP Services," aligning with the current holder.
- The address inventory is finely subdivided into regional blocks with netnames like INDEPENDENCE-5, OLATHE-6, and CONNECTICUT-17, reflecting site-by-site segmentation within the corporate estate.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 23.25.184.0/23
- 24.2.0.0/19
- 50.76.150.0/23
- 50.194.208.0/22
- 50.214.92.0/23
- 50.240.64.0/22
- 50.245.92.0/22
- 50.252.188.0/22
- 64.139.80.0/23
- 64.139.93.0/24
- 66.208.220.0/23
- 66.208.222.0/24
- 67.162.176.0/20
- 68.87.234.0/24
- 69.242.128.0/18
- 69.243.240.0/20
- 69.247.160.0/20
- 69.247.192.0/19
- 69.252.22.0/24
- 69.254.224.0/19
- 70.88.80.0/23
- 70.88.84.0/24
- 70.91.182.0/24
- 71.199.64.0/20
- 74.93.167.0/24
- 74.95.110.0/24
- 75.146.133.0/24
- 75.151.74.0/24
- 96.70.26.0/23
- 96.73.42.0/23
- 96.75.6.0/23
- 96.79.140.0/23
- 96.82.18.0/23
- 96.94.164.0/22
- 96.97.173.0/24
- 96.108.160.0/24
- 173.10.8.0/23
- 173.14.198.0/23
- 174.58.128.0/18
- 184.115.192.0/22
- 2001:558:c0::/44
- 2001:558:fe20::/48
- 2001:559:13f::/48
- 2001:559:4d8::/48
- 2001:559:518::/48
- 2001:559:83ff::/48
- 2001:559:8689::/48
- 2001:559:c3f7::/48
- 2001:559:c4ec::/48
- 2601:300::/26
- 2603:2300::/26
- 2603:300e::/32
- 2603:3095::/32
Upstream networks
- AS7922 Comcast Cable Communications, LLC
Downstream networks
Adjacent networks
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Search Results
IPv4 Prefixes
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IPv6 Prefixes
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Total Prefixes
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Unique /24s
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⚠ SUSPICIOUS PREFIX ANNOUNCEMENTS DETECTED