Autonomous system
AS16435 FLUKE-ELECTRONICS
Unclassified ARIN
Summary
Fluke Electronics
enterprise business infrastructure
Nine prefixes that tile one larger block exactly, each step half the size of the one before.
What it's used for
- An instrument maker's network. Nine IPv4 prefixes announced from the United States, no IPv6, sixty-five thousand five hundred and thirty-six addresses, through two observed BGP neighbours.
Notable
- All nine announcements come out of a single parent block, and together they cover it completely with nothing overlapping and nothing left out.
- The sizes descend in a staircase: the first covers half the parent, the next half of what remains, and so on down to two blocks of the smallest routable size sitting side by side.
- Every one of the nine carries the same netname, and every one is registered to the same company.
- That netname puts a given name in front of the brand, which is the company's older style. The holder field uses a newer one, so the record carries two eras of the same business.
- Eighteen addresses were queried for reverse DNS and none returned a name.
Interesting
- A staircase like this is what a routing table looks like when somebody split a block to steer traffic and then never put it back together. Announcing the parent once would carry the same addresses in a single entry; nine entries means nine decisions, each of which made sense at the time.
- Everyone downstream pays for the split. The addresses are one company's, but the cost of describing them is spread across every router that keeps a full table.
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 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 9 prefixes · 65.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 9 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS16435- Registry name
- FLUKE-ELECTRONICS
- Registrant
- Fluke Electronics
- Abuse contact
- jim.sifferle@tektronix.com
- Registered
- 2000-04-28
- Last changed
- 2012-02-24
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 7 with no ROA
- ROAs
- 0 authorising AS16435
- ASPA
- no ASPA record
- IRR
- 100% registered · 7 of 7 announcements
- Route objects
- 3 naming AS16435
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: 442 networks and 1,773 prefixes, as published 2026-10-13. 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