AS49
National Institute of Standards and Technology
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
- Academic allocation +6
- Trust score 71 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
About National Institute of Standards and Technology
The National Institute of Standards and Technology (NIST) is an agency of the United States Department of Commerce whose mission is to promote American innovation and industrial competitiveness. NIST's activities are organized into physical science laboratory programs that include nanoscale science and technology, engineering, information technology, neutron research, material measurement, and physical measurement.
Network profile
Source: PeeringDB →AS49 — global IP footprint
Cities where AS49 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS49 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 |
|---|---|---|
| 132.163.96.0/24 | 5,078 | 2026-07-19 19:39:39 |
| 129.6.28.0/24 | 4,850 | 2026-07-19 19:39:52 |
| 129.6.128.0/17 | 4,830 | 2026-07-19 19:58:49 |
| 129.6.29.0/24 | 4,826 | 2026-07-19 19:39:52 |
| 129.6.30.0/24 | 4,740 | 2026-07-19 19:39:51 |
| 129.6.50.0/24 | 4,683 | 2026-07-19 19:39:51 |
| 129.6.31.0/24 | 4,679 | 2026-07-19 19:40:51 |
| 129.6.64.0/18 | 4,538 | 2026-07-19 19:39:38 |
| 129.6.24.0/22 | 4,521 | 2026-07-19 19:58:49 |
| 129.6.56.0/21 | 4,510 | 2026-07-19 19:58:49 |
| 129.6.14.0/24 | 4,496 | 2026-07-19 19:58:49 |
| 129.6.16.0/21 | 4,493 | 2026-07-19 19:58:49 |
| 129.6.48.0/23 | 4,491 | 2026-07-19 19:58:49 |
| 129.6.36.0/24 | 4,486 | 2026-07-19 19:58:49 |
| 129.6.40.0/21 | 4,486 | 2026-07-19 19:58:49 |
| 129.6.8.0/22 | 4,485 | 2026-07-19 19:58:49 |
| 129.6.52.0/22 | 4,484 | 2026-07-19 19:58:49 |
| 129.6.32.0/22 | 4,483 | 2026-07-19 19:58:49 |
| 129.6.38.0/23 | 4,476 | 2026-07-19 19:58:49 |
| 129.6.12.0/23 | 4,476 | 2026-07-19 19:58:49 |
| 129.6.0.0/21 | 4,470 | 2026-07-19 19:58:49 |
| 132.163.97.0/24 | 3,247 | 2026-07-19 19:39:39 |
| 129.6.15.0/24 | 3,215 | 2026-07-19 19:39:38 |
| 129.6.64.0/19 | 2,450 | 2026-06-30 23:53:12 |
| 129.6.120.0/21 | 2,450 | 2026-06-30 23:53:12 |
| 129.6.96.0/20 | 2,449 | 2026-06-30 23:53:12 |
| 129.6.114.0/23 | 2,448 | 2026-06-30 23:53:12 |
| 129.6.116.0/22 | 2,447 | 2026-06-30 23:53:12 |
| 129.6.113.0/24 | 2,446 | 2026-06-30 23:53:12 |
Frequently Asked Questions
What is AS49?
AS49 is an Autonomous System Number assigned to National Institute of Standards and Technology. 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 AS49 announce?
AS49 announces 65.5K IPv4 addresses distributed across 18 routed CIDR prefixes. The network is registered in United States.
Who operates AS49?
AS49 is operated by National Institute of Standards and Technology. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS49 registered in?
AS49 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
