Autonomous system
AS3300 BT
Residential DROP-listed space RIPE
Summary
BT (British Telecommunications)
transit enterprise legacy
BT's continental European and global IP network (BT), operated by British Telecommunications and distinct from BT's UK consumer network.
What it's used for
- IP transit, managed WAN and enterprise connectivity for BT Global's business customers across Europe and beyond.
- Roughly half a million IPv4 addresses, mostly serving corporate customers rather than residential broadband.
Notable
- BT runs multiple ASNs. The UK domestic and BTnet side is announced separately from AS2856; 3300 is the pan-European and international business network.
- This ASN carries the lineage of BT's continental backbone, built out under the BT Ignite brand around 2000 and later absorbing the European assets of the BT/AT&T Concert joint venture after it unwound.
Interesting
- The round, low number is a coincidence of sequential allocation, but it does sit in the range handed out to the large incumbent carriers who joined the commercial internet early.
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 17 exchanges in 8 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| IX.br (PTT.br) São Paulo | São Paulo, Brazil | 187.16.222.23 |
| NAPAfrica IX Johannesburg | Johannesburg, South Africa | 196.60.8.58 |
| Equinix Internet Exchange Singapore | Singapore, Singapore | 27.111.229.73 |
| Equinix Internet Exchange Ashburn | Ashburn, United States | 206.126.237.17 |
| Hong Kong Internet Exchange | Hong Kong, China | 123.255.90.16 |
| JPIX Tokyo | Tokyo, Japan | 210.171.224.225 |
| Toronto Internet Exchange | Toronto, Canada | 206.108.35.114 |
| Equinix Internet Exchange Chicago | Chicago, United States | 208.115.136.197 |
Transit providers
25 upstream, 19 downstream and 69 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 103 prefixes · 513K addresses IPv6 21 prefixes
| Country | Name | Prefixes |
|---|---|---|
| GB | United Kingdom | 124 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS3300- Registry name
- BT
- Registrant
- CIP-MNT
- Abuse contact
- abuse@eu.bt.net
- Registered
- 2002-09-19
- Last changed
- 2026-05-05
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 71% valid · 108 valid, 44 with no ROA
- ROAs
- 80 authorising AS3300
- ASPA
- no ASPA record
- IRR
- 100% registered · 152 of 152 announcements
- Route objects
- 374 naming AS3300
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
3 DROP matches Announced space overlapping the DROP prefix list.
| Announced | DROP entry | Record |
|---|---|---|
| 204.140.64.0/18 | 204.140.104.0/21 | SBL624894 |
| 204.140.64.0/18 | 204.140.112.0/21 | SBL624895 |
| 204.140.64.0/18 | 204.140.120.0/22 | SBL624896 |
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 431 networks and 1,768 prefixes, as published 2026-10-12. 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