Autonomous system
AS4133 BITWISE
Unclassified ARIN
Summary
Bitwise Internet Technologies, Inc.
hosting legacy
BITWISE is Bitwise Internet Technologies, Inc., a small Boston, Massachusetts internet and hosting company.
What it's used for
- Internet connectivity, web and server hosting, and network services for business customers in the Boston area.
- The announced space is a handful of legacy blocks, used for hosted systems and customer assignments rather than a large subscriber base.
Notable
- Bitwise is a long-lived independent operator rather than a carrier, and the registry contacts have been stable for a very long time, which is unusual in a space where small ISPs are typically absorbed or shut down.
- The ARIN autnum registration dates to 1994, and the announced prefixes are legacy
204.xand207.xblocks from the same era.
Interesting
- Boston's early concentration of universities and technology companies produced a wave of small commercial ISPs in the mid-1990s. Very few of the ASNs handed out then are still announced by their original holder.
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.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS6079 | RCN | 243 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-29, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 9.22K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 4 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS4133- Registry name
- BITWISE
- Registrant
- Bitwise Internet Technologies, Inc.
- Abuse contact
- admin@bitwise.net
- Registered
- 1994-12-01
- Last changed
- 1998-11-08
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 4 with no ROA
- ROAs
- 0 authorising AS4133
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 4 announcements 4 other origin
- Route objects
- 0 naming AS4133
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: 448 networks and 1,849 prefixes, as published 2026-10-29. 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