Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Trust score 65 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 143.165.0.0/18 | 16.4K |
1.3%
|
TIAA-CREF | US | — | — |
| 143.165.128.0/19 | 8.2K |
5.2%
|
TIAA-CREF | US | Colorado | Broomfield |
| 143.165.224.0/19 | 8.2K |
0.3%
|
TIAA-CREF | US | — | — |
| 143.165.80.0/22 | 1.0K |
4.3%
|
TIAA-CREF | US | — | — |
| 143.165.208.0/22 | 1.0K |
0.1%
|
TIAA-CREF | US | — | — |
| 143.165.216.0/22 | 1.0K |
0.0%
|
TIAA-CREF | US | — | — |
| 143.165.90.0/23 | 512 |
0.0%
|
TIAA-CREF | US | — | — |
| 143.165.190.0/23 | 512 |
0.0%
|
TIAA-CREF | US | — | — |
| 103.175.178.0/24 | 256 |
0.0%
|
TIAA-CREF | IN | — | — |
| 103.215.155.0/24 | 256 |
0.0%
|
TIAA-CREF | IN | — | — |
| 143.165.88.0/24 | 256 |
0.0%
|
TIAA-CREF | US | — | — |
| 143.165.161.0/24 | 256 |
13.3%
|
TIAA-CREF | US | — | — |
| 143.165.187.0/24 | 256 |
0.4%
|
TIAA-CREF | US | — | — |
| 143.165.188.0/24 | 256 |
6.3%
|
TIAA-CREF | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS2923 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 143.165.80.0/24 | 27,940 | 2026-07-25 12:36:51 |
| 143.165.138.0/24 | 16,771 | 2026-07-25 12:19:36 |
| 143.165.136.0/24 | 16,752 | 2026-07-25 12:22:37 |
| 143.165.41.0/24 | 8,483 | 2026-07-25 14:56:44 |
| 143.165.208.0/24 | 6,638 | 2026-07-25 12:19:36 |
| 143.165.88.0/24 | 6,113 | 2026-07-25 16:01:06 |
| 143.165.190.0/23 | 5,948 | 2026-07-25 12:27:11 |
| 143.165.0.0/19 | 5,936 | 2026-07-25 12:23:15 |
| 143.165.32.0/19 | 5,935 | 2026-07-25 12:25:10 |
| 143.165.161.0/24 | 5,932 | 2026-07-25 12:29:11 |
| 143.165.90.0/23 | 5,928 | 2026-07-25 12:26:56 |
| 143.165.224.0/19 | 5,912 | 2026-07-25 12:28:52 |
| 143.165.128.0/19 | 5,912 | 2026-07-25 12:31:08 |
| 143.165.80.0/22 | 5,905 | 2026-07-25 12:32:55 |
| 143.165.32.0/20 | 5,835 | 2026-07-25 12:25:33 |
| 143.165.128.0/20 | 5,805 | 2026-07-25 12:30:49 |
| 143.165.217.0/24 | 5,760 | 2026-07-25 12:32:40 |
| 143.165.218.0/24 | 5,747 | 2026-07-25 12:33:16 |
| 143.165.219.0/24 | 5,739 | 2026-07-25 12:33:54 |
| 143.165.216.0/24 | 5,714 | 2026-07-25 12:37:55 |
| 143.165.187.0/24 | 5,687 | 2026-07-25 12:29:40 |
| 143.165.209.0/24 | 5,633 | 2026-07-25 12:19:36 |
| 143.165.210.0/24 | 5,633 | 2026-07-25 12:19:36 |
| 143.165.211.0/24 | 5,626 | 2026-07-25 12:19:36 |
| 103.215.155.0/24 | 5,027 | 2026-07-25 12:27:26 |
| 103.175.178.0/24 | 4,891 | 2026-07-25 12:35:33 |
| 143.165.208.0/22 | 4,102 | 2026-07-25 16:01:16 |
| 143.165.188.0/24 | 3,655 | 2026-07-25 16:01:16 |
| 143.165.216.0/22 | 3,614 | 2026-07-25 16:01:16 |
Frequently Asked Questions
What is AS2923?
AS2923 is an Autonomous System Number assigned to TIAA-CREF. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS2923 announce?
AS2923 announces 38.4K IPv4 addresses distributed across 14 routed CIDR prefixes. The network is registered in United States.
Who operates AS2923?
AS2923 is operated by TIAA-CREF. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS2923 registered in?
AS2923 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
