AS15141 — ASN-BAUSCH-LOMB

AS15141 announces 14 IPv4 prefixes covering 60,928 addresses and 0 IPv6 prefixes.

About this network

Fourteen announcements carving up one range, all wearing the same label.

What it's used for

• An eye-health manufacturer's network. Fourteen IPv4 prefixes announced from the United States, no IPv6, and two observed BGP neighbours.

Notable

• Every prefix falls inside 161.242, split at seven different lengths from a /18 down to /24 blocks, so one allocation is announced as fourteen routes.
• Every resolved block carries the netname BAUSCH-LOMB and the same registrant, with the ampersand in the company name replaced by a hyphen in the netname.
• The AS handle prefixes that same hyphenated form with the object type.
• Eighteen addresses were queried for reverse DNS and none returned a name.
• Sixty thousand addresses sit behind two observed upstreams.

Interesting

• Fourteen routes and one label is the pattern that recurs across every large single-holder network in this range. Routing carries all the structure; the registry carries none of it. Nothing outside the company can say which piece is a factory, an office or a laboratory.
• An ampersand is one of the characters registry identifiers cannot hold, so it becomes a hyphen and the netname stops matching the company's legal name. Searching for either form misses the other.
• Two upstreams for sixty thousand addresses is thin, and combined with an empty reverse zone it describes a network that reaches out far more than it is reached.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 161.242.0.0/21
• 161.242.8.0/23
• 161.242.10.0/24
• 161.242.12.0/22
• 161.242.16.0/20
• 161.242.32.0/22
• 161.242.36.0/24
• 161.242.38.0/23
• 161.242.40.0/21
• 161.242.48.0/20
• 161.242.64.0/18
• 161.242.128.0/19
• 161.242.160.0/20
• 161.242.192.0/18

Upstream networks

• AS7018 AT&T Enterprises, LLC
• AS2856 British Telecommunications Limited

Adjacent networks

• AS7018 AT&T Enterprises, LLC
• AS2856 British Telecommunications Limited

Routing security

• RPKI: 0 valid, 0 invalid and 4 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 136 route objects.
• Listed in as-sets: AS-BTGB-CUST, AS-HKT-AS4515, AS-HKT-NETVIGATOR, AS-HUTCHCITY, AS-IPARTNERS, AS-KDD, AS-KORNETBGP, AS16657:AS-CUST, AS8246:AS-TPNET, AS9381:AS-9381-TRANSIT.