Data as of Nov 14, 2026

154.37.91.0/24

No anonymizer space · no proxy exits in 30 days

Tier.Net Technologies LLC · space held by Cogent Communications, LLC

Announcement
this exact prefix
No RPKI
Announced by
Type
Hosting
Risk
50 / 100 · Medium
IPv4 market

Path

1 · Holder
record created Feb 5, 1992 · reallocated to Aventice LLC Dec 8, 2021
2 · Leased from
3 · Announced by
AS397423 Tier.Net Technologies LLC
since Jan 2022 · 4.9 yr ago
4 · Use
Hosting

Lineage

How this block came to its use, oldest first. The whole IPv4 market →

154.37.91.0/24

From the registry to its use

  1. Feb 5, 1992
    Registry record
    Cogent Communications, LLC
    Direct Allocation (legacy, pre-1997)
    154.37.0.0/16
  2. Sep 15, 2006– today
    Announced
    AS174 Cogent Communications, LLC
    as part of 154.36.0.0/14
    154.36.0.0/14
  3. Dec 8, 2021
    Reallocated
    Aventice LLC
    Reallocated
    154.37.64.0/18
  4. Jan 4, 2022– today
    Announced
    AS397423 Tier.Net Technologies LLC
    Hosting
  5. Jan 10, 2022
    Route object
    AS397423 Tier.Net Technologies LLC
    RADB route object for AS397423 Tier.Net Technologies LLC, maintainer MAINT-AS397423
  6. today
    Leased from
    Aventice
    IP broker

Announcements

Less specific

Covering announcements

PrefixOriginTypeLeased fromProxy exitsRPKI
154.36.0.0/14
since Sep 2006
AS174Internet providerIP broker Aventice (part)1,911
654 always on

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
154.37.0.0/1665,536COGENT-154-37-16Cogent Communications, LLC (COGC) · USDirect AllocationFeb 5, 1992abuse@cogentco.com
└ 154.37.64.0/1816,384AVENTICE-CGNT-NET-14Aventice LLC (AL-584) · USReallocatedDec 8, 2021abuse@aventice.com

Network & registry

Routing timeline

Covering aggregate above, the prefix's own history below

Summary

Routing history

Pattern
Stable
First seen
Jan 2022
Current origin since
Jan 2022 · 4.9 yr
Origin networks
1