Autonomous system
AS19388 -Reserved AS-
Unclassified ARIN Educational/Research
Summary
Team Cymru
security research infrastructure other
AS19388 is operated by Team Cymru Inc.
What it's used for
- The space carries a single IPv6 prefix,
2604:8800:ffff::/48, with no announced IPv4 addresses. - The AS maintains 34 observed neighbours against a minimal address inventory, indicating a role focused on connectivity and peering rather than large-scale address aggregation.
Notable
- The registry holder is listed as TEAM-CYMRU-3, consistent with the operator identity.
- The address inventory consists solely of one IPv6 prefix, with no IPv4 prefixes in the inventory or announced.
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
Recorded at 3 exchanges in 3 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| IX.br (PTT.br) São Paulo | São Paulo, Brazil | 2001:12f8::217:178 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.210.251 |
| New York International Internet Exchange | New York, United States | 198.32.160.46 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-26, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 0 prefixes · 0 addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS19388- Registry name
- TEAM-CYMRU-3
- Registrant
- Team Cymru Inc.
- Abuse contact
- peering@cymru.com
- Registered
- 2025-12-05
- Last changed
- 2025-12-10
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- Team Cymru Labs
- Also known as
- Team Cymru
- Network type
- Educational/Research
- Scope
- Global
- Traffic ratio
- Not Disclosed
- Peering policy
- Restrictive
- IRR as-set
AS19388:AS-CONE- Present at
- 3 exchanges
- Website
- https://www.team-cymru.com/
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 1 valid, 0 with no ROA
- ROAs
- 2 authorising AS19388
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 7 naming AS19388
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: 446 networks and 1,852 prefixes, as published 2026-10-27. 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