Autonomous system
AS5638 BREWER-SCIENCE - Brewer Science
Unclassified ARIN
Summary
Brewer Science
enterprise legacy
The corporate network of Brewer Science, Inc., a specialty-materials company in Rolla, Missouri that makes thin films and coatings for semiconductor and microelectronics manufacturing, registered under the handle BREWER-SCIENCE.
What it's used for
- Enterprise connectivity for the company's headquarters, laboratories, and manufacturing operations, along with its public-facing services.
Notable
- A single 256-address block. This is a private manufacturer routing its own space, not a provider selling connectivity.
- ARIN records date the current registration to 2009, so the low AS number is a later reassignment rather than an early-internet allocation.
Interesting
- Brewer Science is best known for anti-reflective coatings used in photolithography, materials that sit several layers deep inside the chip fabrication process rather than in any finished product.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-07, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 256 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS5638- Registry name
- BREWER-SCIENCE
- Registrant
- Brewer Science
- Abuse contact
- admin@brewerscience.com
- Registered
- 2009-10-02
- Last changed
- 2012-03-20
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 1 authorising AS5638
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 1 naming AS5638
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 454 networks and 1,852 prefixes, as published 2026-11-08. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere