AS11528 — PHOTRONICS
AS11528 announces 7 IPv4 prefixes covering 2,560 addresses and 0 IPv6 prefixes.
About this network
PHOTRONICS is Photronics Inc., a manufacturer of photomasks — the master templates used to print circuit patterns onto semiconductor wafers and flat-panel displays. The AS carries the company's own corporate network.
What it's used for
- Enterprise connectivity for a global manufacturer: corporate systems, mail, and the customer-facing portals through which chip designers submit mask data to the fabs.
- RIS sees 10 announced IPv4 prefixes totalling 2,560 addresses, no IPv6, and 8 observed BGP neighbours. Every announcement is a /24. Eight neighbours is more than a single-site enterprise usually needs but nowhere near carrier scale, and it fits a company with manufacturing sites on several continents, each taking local transit while announcing space from the same AS.
Notable
- Reverse DNS is sparse but first-party and consistent: mailfrom.photronics.com appears on three different blocks (206.220.70.0/24, 198.61.5.0/24, and 199.36.7.0/24), and one host answers as portal-old.photronics.com. Outbound mail relays spread across separate prefixes, plus a superseded customer portal still holding an address, is the ordinary texture of a long-lived corporate network rather than anything hosted or leased.
- All prefixes register to Photronics Inc. Holder and registrant agree throughout, so the inventory is self-held despite being scattered across 199.36.x, 206.220.x, 198.61.x, and a 192.129.97.0/24 from the old Class C swamp.
Interesting
- Two ARIN netblock handles are worth a second look. NETBLK-PLABMIL sounds like it could be military space, and it is not: PLAB is Photronics' stock ticker, and the handle is an internal site code on a block whose registered org is plainly Photronics Inc. Handles are frequently internal shorthand that names nobody, and reading them as words is how classifications go wrong. The org field, not the handle, is the thing to trust.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 192.129.97.0/24
- 198.61.5.0/24
- 199.36.0.0/24
- 199.36.2.0/24
- 199.36.4.0/24
- 199.36.7.0/24
- 206.220.68.0/22
Upstream networks
- AS174 Cogent Communications, LLC
- AS17408 AboveNet Communications Taiwan
- AS4766 Korea Telecom
- AS15372 IBH connect GmbH
- AS3462 Data Communication Business Group
- AS42973 Convergence Group (Wireless) Networks Limited
- AS7385 Allstream Business US, LLC
- AS2856 British Telecommunications Limited
Adjacent networks
BGP / ASN / CIDR
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IPv4
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Search Results
IPv4 Prefixes
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IPv6 Prefixes
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Total Prefixes
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Unique /24s
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⚠ SUSPICIOUS PREFIX ANNOUNCEMENTS DETECTED