Network report

Who holds an IP address, prefix or AS number, how it is routed (origin AS, RPKI, IRR), its reverse DNS, blocklist listings and PeeringDB record, with what to fix first.

AS33662 · 1 second ago

curl -s "https://thenetworkery.com/api/v1/network-report?query=AS33662"

JSON Docs

Warning: AS33662 (CMCS) announces 15 IPv4 and 102 IPv6 prefixes. 4 warnings

AS page	AS33662
Holder	CMCS - Comcast Cable Communications, LLC
Allocation	ARIN, United States (US), assigned 2005-02-16
Prefixes (IPv4 / IPv6)	15 / 102
RPKI valid	98% (115 / 117)
Upstreams and peers	2
Peering policy	Restrictive

What to fix

Warning
2 of 117 announced prefixes have no ROA (RPKI not found): 64.189.25.0/24, 198.46.65.0/24.

Without a ROA, networks cannot tell your routes from a hijack.

Fix: Create a ROA for each at your RIR portal, with origin AS33662 and a max length equal to the prefix length:
```
64.189.25.0/24 AS33662 max-length /24
198.46.65.0/24 AS33662 max-length /24
```
Open in RPKI / ROA validator Guide
Warning
114 of 117 announced prefixes have no IRR route object: 2001:559:8156::/48, 2001:559:392::/48, 2001:559:c4e2::/48, 2001:559:265::/48, 2001:559:85e9::/48 (+109).

Many networks build their prefix filters from IRR data; without route objects some of them drop the routes.

Fix: Create route (IPv4) and route6 (IPv6) objects with origin AS33662 in your RIR’s IRR database (or RADB).
```
route6: 2001:559:8156::/48
origin: AS33662

route6: 2001:559:392::/48
origin: AS33662

route6: 2001:559:c4e2::/48
origin: AS33662
```
Open in ASN & BGP prefix lookup
Warning

No IRR as-set is listed.

Peers and route servers build prefix filters from the as-set. Without one they fall back to the AS number alone, which breaks as soon as you have customers.

Fix: Create an as-set in your RIR’s IRR database and add it to your PeeringDB record.

Open in PeeringDB lookup
Warning

No public NOC, policy or technical contact.

Other networks use these addresses to set up peering and to reach you during an incident.

Fix: Add a role contact (for example noc@ or peering@ an address you monitor) with visibility Public.

Open in PeeringDB lookup

Checks

Routing and RPKI 2 of 117 announced prefixes have no ROA (RPKI not found): 64.189.25.0/24, 198.46.65.0/24.

Pass: AS33662 announces 15 IPv4 and 102 IPv6 prefixes.
Warning: 2 of 117 announced prefixes have no ROA (RPKI not found): 64.189.25.0/24, 198.46.65.0/24.
Info: 115 of 117 announced prefixes are RPKI valid.
Warning: 114 of 117 announced prefixes have no IRR route object: 2001:559:8156::/48, 2001:559:392::/48, 2001:559:c4e2::/48, 2001:559:265::/48, 2001:559:85e9::/48 (+109).
Info: 2 upstreams and peers, 52 downstream networks seen.

Holder	CMCS - Comcast Cable Communications, LLC
IPv4 prefixes	15
IPv6 prefixes	102
RPKI	115 valid · 2 not found
Without IRR route object	114
Downstream networks	52

Routes to fix

Prefix	RPKI
64.189.25.0/24	No ROA
198.46.65.0/24	No ROA

Upstreams and peers seen to the left 2

AS7922 Comcast AS3356 Lumen AS3356

Announced prefixes 117

24.104.75.0/24 50.201.112.0/24 50.217.18.0/24 50.220.66.0/24 50.228.10.0/24 50.228.194.0/24 50.231.217.0/24 50.232.18.0/24 50.232.206.0/24 50.234.8.0/24 50.235.195.0/24 50.235.196.0/24 64.189.25.0/24 198.46.65.0/24 208.110.207.0/24 2001:559:1b3::/48 2001:559:1f2::/48 2001:559:3e3::/48 2001:559:3e4::/48 2001:559:3ed::/48 2001:559:4b7::/48 2001:559:4fe::/48 2001:559:5ab::/48 2001:559:18c::/48 2001:559:38d::/48 2001:559:42::/48 2001:559:81c9::/48 2001:559:81f4::/48 2001:559:83c1::/48 2001:559:83de::/48 2001:559:83fa::/48 2001:559:84b7::/48 2001:559:85ac::/48 2001:559:85ce::/48 2001:559:85cf::/48 2001:559:85d0::/48 2001:559:85d7::/48 2001:559:85d9::/48 2001:559:85e9::/48 2001:559:85ed::/48 2001:559:85f8::/48 2001:559:86ae::/48 2001:559:86d6::/48 2001:559:86d7::/48 2001:559:86d8::/48 2001:559:87d0::/48 2001:559:153::/48 2001:559:154::/48 2001:559:182::/48 2001:559:256::/48 2001:559:265::/48 2001:559:287::/48 2001:559:334::/48 2001:559:351::/48 2001:559:392::/48 2001:559:397::/48 2001:559:398::/48 2001:559:728::/48 2001:559:804d::/48 2001:559:852d::/48 2001:559:852e::/48 2001:559:852f::/48 2001:559:857b::/48 2001:559:863f::/48 2001:559:866f::/48 2001:559:8012::/48 2001:559:8156::/48 2001:559:8168::/48 2001:559:8172::/48 2001:559:8311::/48 2001:559:8424::/48 2001:559:8472::/48 2001:559:8544::/48 2001:559:8603::/48 2001:559:8739::/48 2001:559:8748::/48 2001:559:8771::/48 2001:559:8772::/48 2001:559:8783::/48 2001:559:c0e8::/48 2001:559:c020::/48 2001:559:c021::/48 2001:559:c1a6::/48 2001:559:c1fc::/48 2001:559:c1fe::/48 2001:559:c1ff::/48 2001:559:c2d0::/48 2001:559:c3ae::/48 2001:559:c4e2::/48 2001:559:c20f::/48 2001:559:c23f::/48 2001:559:c26f::/48 2001:559:c37e::/48 2001:559:c37f::/48 2001:559:c42d::/48 2001:559:c42f::/48 2001:559:c46f::/48 2001:559:c56a::/48 2001:559:c157::/48 2001:559:c181::/48

Showing the first 100.

Source: RIPEstat (RIPE NCC RIS, Routinator, IRR); AS names: Team Cymru

Open in ASN & BGP prefix lookup

Registration Found at rdap.arin.net.

Pass: Found at rdap.arin.net.

Name	CMCS
Handle	AS33662
Range	AS33662
Status	active
Registered	2005-02-16T14:59:31-05:00
Last changed	2021-01-25T15:24:13-05:00
Abuse contact	abuse@comcast.net

Allocation

Registry (RIR)	ARIN
Country	United States (US)
Delegated on	2005-02-16
Status	Assigned
Delegated range	AS33662

Source: RIR delegation data, updated daily. The country is where the range was registered, not necessarily where it is used.

Contacts

Role	Name	Email
registrant	Comcast Cable Communications, LLC

Source: https://rdap.arin.net/registry/autnum/33662. Registration data from rdap.arin.net, shown under its terms of use (terms): not for marketing or bulk collection.

Open in WHOIS / RDAP lookup

PeeringDB No IRR as-set is listed.

Pass: AS33662 is in PeeringDB as Comcast - Houston.
Info: Peering policy: Restrictive.
Info: No internet exchange ports are listed.
Warning: No IRR as-set is listed.
Warning: No public NOC, policy or technical contact.
Info: The record was last updated 2022-07-27.

Network	Comcast - Houston (Comcast - Houston)
AS number	AS33662
Type	Cable/DSL/ISP, Regional
Website	http://www.comcast.net
Prefixes (IPv4 / IPv6)	0 / 0
Traffic	Not Disclosed
Peering policy	Restrictive
Policy URL	http://www.comcast.com/peering
Locations	Not Required
Ratio required	Yes
Contracts	Required
Last updated	2022-07-27

Source: PeeringDB. Results are cached for an hour.

Open in PeeringDB lookup